Week 9: Why flow is vital for a successful reef tank | 52 Weeks of Reefing
100 Comments


Today on the BRS 160 we are going get water
flowing in this tank! Hey guys my name is Ryan, welcome to another
week of the BRS 160 where every week we do our best to help you guys, members of the
reefing community enjoy your tanks and find new ways to explore the hobby. We do that
by following the set up and progression of this one hundred and sixty gallon reef tank. Today we will talk about why proper flow is
important; give a solid overview of most the pump options out there including ac powerheads,
wave makers, DC powerheads, gyres and external closed loops. We will also hit on all the
features of the most popular brands, proper ongoing maintenance for your pumps and finish
with the flow solution we selected for the BRS 160. Water flow is one of the more important elements
of a reef tank. Water movement promotes gas exchange which increases oxygen, decreases
carbon dioxide and helps maintain the PH of the tank. Proper water flow also plays an important
role in biological function within the coral. Good flow will keep the coral’s tissue surrounded
with oxygen rich water, calcium and alkalinity which promotes proper respiration and calcification. Water flow also serves as the mechanism which
corals use to pump and circulate fluids, nutrients, important elements and waste within the coral
by constantly pushing on the corals soft tissue with irregular patterns. Strong flow is also believed to be closely
related to preventing coral bleaching by helping the coral rid itself of the toxic oxygen radicals
which can be produced with long intense lighting periods like those found in many reef aquariums. So what is good flow, it really depends on
the tank and what is in it but it is often anywhere between twenty and fifty times the
tank volume an hour. So in a hundred gallon tank it would be two to five thousand gallons
an hour. Some reefers will go significantly higher than that. As long as the corals tolerate the flow and
thrive I don’t think you can really have too much. The general rule of thumb is softy tanks
like lower flow, LPS and mix tanks do well with medium flow as long as the corals are
placed in friendly locations and SPS tanks do best in high flow tanks. These days flow is almost always provided
with a powerhead of some type which is just a small efficient pump that uses an impeller
or propeller to shoot high velocity water out the front. This type of pump is generally
really easy to install and consumes very little power for the amount of flow it creates. The most popular are AC type powerheads. AC
means they operate on the typical alternating current in your home and they run at a single
speed. For instance, this Tunze stream 6065 is rated at seventeen hundred gallons an hour
and it is going to operate at the single speed all the time. These AC power heads are the most popular
simply because they are the most affordable. There are three major brands which all have
different advantages. Tunze is the originator of the prop style powerhead and the first
company to bring this type of technology to the aquarium. Tunze’s biggest advantage over others is
a refined quality, adjustability and small form factor. The Nano streams in particular
can provide up to seventeen hundred gallons an hour in this tiny form factor which can
be aimed in literally any direction. The magnetically mounted swivel ball and small form factor
is one of the reasons why the Tunze is so popular with reefers all over the world and
one of my personal favorites Tunze also sells these rocks you can use to
hide the pump which is an interesting accessory. Behind that Rodger at Tunze USA is someone
I personally trust and takes care of his customers so if you ever have a problem with a Tunze
product he will take care of you. Hydor also makes excellent powerheads. One
of the biggest differences here it’s the mount which uses a suction cup magnet hybrid
mount which provides for a very secure low profile mounting option. The Hydor evolution is a bit larger than some
of the other options and the swivel ball mount doesn’t have as big of a range but it does
have one sizable advantage over the rest they come at the lowest price point which will
make them attractive to quite a few reefers. Hydor just released the new generation three
powerheads which aren’t designed to replace the current line but for a few more bucks
provide a refined pump with additional adjustability and efficiencies. They have an interesting new cup shaped magnet
mount which reduces the over all sizes of the pump as well as increases range of angles
the pump can be positioned. What’s also pretty cool is the pumps come with three different
caps which create a couple different flow patterns and keep livestock out of the pumps,
even when they are off which is important. On top of that they are power efficient at
the Koralia nine thousand here pushes as much as twenty four hundred gallons an hour for
less than ten watts and the Koralia five thousand pushes thirteen hundred gallons for just over
five watts. Both of which is pretty impressive Sicce has some really interesting options
which serve completely different ends of the market. The voyager line has the disadvantage
of having the largest form factor of most powerheads out there but there are hands down
the best powerhead on the market for use on wave makers which I will explain more thoroughly
in just a minute. On the other end Sicce has the new xstream
pumps which are absolutely tiny and go up to twenty one hundred gallons. The xstreams
are going to be attractive to a lot of reefers looking for the smallest least obtrusive pump
possible. Most of us don’t want to see any equipment in the tank because no matter how
you cut it cords and pumps are not attractive components of the reef tank. However this
tiny form factor does have a bit of a price premium so don’t be surprised when you have
to pay more for this type of thing. As to positioning the pumps this will depend
a lot on your tank size and aquascape but the most common placement for ac powerheads
like all of these is one on each end of the tank and a couple often a couple slightly
lower flow options on the back. The thing about AC powerheads is they flow
at a single speed twenty four hours a day in the exact same way which can create some
fairly stagnate flow patterns so it is important to try and make sure the pumps are aimed in
a way that creates some amount of turbulence and variances flow patterns. The biggest reason is corals just don’t
do well when they are blasted in the exact same way all day every day. Strong stagnant
flow can damage tissue, impact how the coral circulates fluids within the tissue and result
in some fairly unnatural growth patterns. So coral placement and long term growth patterns
become bigger issues. To help solve that many reefers will implement
what’s commonly referred to as a wave maker which turns the pumps on and off to create
different flow patterns. For example the wave surfer from Sicce and Hydor smartwave will
alternatively turn on pumps to create different flow patterns in the tank. Almost every aquarium controller like the
Neptune apex or reef keeper will also have a built in wave maker or pump oscillation
programing to help vary the flow. Because an inexpensive controller can cost just a
bit more than stand-alone wave maker I’d say controllers are a more popular option. In addition to that you can use simple digital
timers as well. For instance I could use the timer to set the right pump to be on for four
hours, left for four hours and then both for four hours and just let that cycle all through
the day. You could also leave the main left and right powerheads on all the time and just
oscillate the back pumps back and forth to create some turbulence and new flow patterns. There are a few things you should consider
with wave makers. The first is how they significantly reduce overall flow. If I have two, thousand
gallon an hour pumps on the tank it has four thousand gallons of flow. However if I use
a wave maker which oscillates between turning one pump on and the other off I only have
one pump running at a time and the tank has half the flow at two thousand gallons an hour
rather than four. That doesn’t mean you need twice the strength
of pumps if you use a wave maker but you will want to factor that into the equation. You
might high slightly high flow rate pumps but more commonly you might get additional pumps
like those on the back of the tank if you are running a wave maker. You should also consider flow patterns and
length of the on off cycles. Some reefers will run very short pulses but more common
is longer surges from minutes to hours which have enough time to create an actual flow
pattern which is more likely to keep significant water movement in hard to reach areas behind
the rock work or even within porous rock. Lastly you should be aware that the on off
cycles are hard on the pump. AC powered pumps by nature will start the prop in either direction.
We need the prop to spin in particular direction to create forward flow. Most of AC powerheads
have some type of mechanical stopper or clutch which prevents the pump from running backward.
While it works anything mechanical like this does ware out over time so you can be absolutely
certain running your AC pumps on a wavemaker will shorten its useable life to some degree.
How much is mostly how many times a day the pump is turned on and off and the resulting
wear on the mechanical components. For instance if you set your own off cycles
to ten seconds that’s over eight thousand times a day or three million times a year
the pump turns on and off. It should be fairly obvious how hard that is going to be on your
pump. If you reduce the cycles to every hour that’s only twenty four times a day and
less than nine thousand times a year and it will last a lot longer. This is where those Sicce voyager pumps come
in. They are fairly big and at face value might not be your first choice but they are
designed specifically to operate long term on wave makers in two different ways. The voyager two three and four all use this
unique design which uses an impeller rather than a propeller. The impeller can turn on
in either direction and still function properly so it doesn’t need that mechanical stopper
or clutch to reverse the direction. Net result is this is the ideal pump to run on a wave
maker because there are fewer components to wear out, especially if you want to run very
short pulses with hundreds of thousands to millions of on off cycles a year. The larger higher flow voyagers are a bit
different. They also use a propeller but rather than rely on a mechanical function they utilize
an electrical design which forces the pump to start in the right direction. Again without
the mechanical wear these will last a lot longer on wave makers as well. This is where DC or direct current pumps come
in. DC pumps are not only capable of always starting in the correct direction every time
but they also can slowly and evenly ramp up and down from zero gallons to thousands of
gallons an hour. This also opens the pumps up to some really unique designs. I’ll start with the Tunze DC controllable
pumps. Like most DC pumps they have the ability to run at a wide range of speeds and vary
the flow rates. I think its biggest advantage is flexible placement options, low profile,
they run super quiet and adjustability. The head can be aimed in any direction so it is
pretty common to see these installed on the back of the tank which makes hiding cords
easier and keeps ugly pumps off the side panes of your tank. We set up this demo to show you even with
the pumps installed on near the back of the tank where can hide all the cords nicely the
flow created is substantial and covers the entire tank. This is just a great low profile
clean installation All Tunze controllable DC pumps now come with
a controller which allows you to adjust the flow rate from zero to the maximum of the
pumps range, adjust the length of the cycles as well as the strength of the alternating
cycles. The pumps can also be linked together so they operate in unison synced together
or opposite cycles of each other to help create wave effects and other flow patterns. If you want to go behind that they have more
advanced controllers you can pick up which allow for more flexibility if you require
it. You can also hook it up to the variable voltage ports on popular controllers like
the apex to get some serious control over the pump and leverage the power of owning
a full aquarium controller. What’s really cool is the safety connector
which is the battery backup for the Tunze controllable pumps which automatically turns
your pumps on during a power outage Other brands out there have battery backup options
but what makes the Tunze option unique is you can get your own battery of any size you
feel is appropriate for your tank which means you can get a lot more backup run time and
you can even pick up some additional batteries if you need them during a prolonged outage.
You can even do some clever things like hook it up to a solar panel. One of the most popular DC pump designs is
the Vortech from Ecotech. This one is unique because it is a magnetically coupled design
where the motor is on the outside of the tank and the pump head is on the inside which to
be frank is just cool but there are some advantages like keeping the pump motor and the heat generated
out of the tank. The Vortechs are typically placed with one
pump on each end of the tank. While they do require a power cord to run and power the
pump they communicate wirelessly with other pumps on the tank so you don’t need a cord
connecting them which is nice. If you pick up the reef link you can even control them
wirelessly over your phone. Where Ecotech really excels is their programing
and ease of use ether on your phone or their control module. You can do all types of preset
programing including reef crest mode that simulates a high energy reef environment,
long pulses which can create a type of gyre, short pulses for standing waves, tidal swell
and nutrient transport modes. You can see the in constant on mode there
is a lot of turbulence and a ton of flow in the tank but settings like reef crest create
that important varied flow we were talking about and a lot of people like the wave effect
which creates a lot of movement in the water but a very different fashion. Ecotech also provides a battery backup option
which can power up to two pumps during a power outage for anywhere from ten to seventy two
hours depending the size and quantity of pumps. A more recent entry to the powerhead world
is the gyre from Coralvue and Maxspect. I have to say I really like this pump a lot,
what makes it unique is it creates a circular type of flow pattern it in the tank where
a thin sheet of water is sent across the top of the tank where it curves back down the
other side and returns on the bottom to create the gyre. The gyre has programing which allows you to
create pulses as well as run in reverse to vary the flow pattern up a bit. I will say
reverse is a significantly different flow pattern which you can see here, it doesn’t
cross the tank the same way but it does vary things up a bit. There is also a new module out that allows
you to hook it up to the variable voltage connector on your controllers like your apex
as well as a brand new batter back up option for the gyre to keep it running during power
outages. Personally I think alternating gyres with
one gyre on each side of the tank alternating back and forth periodically is one of the
coolest things you can install on a tank. It was a bit tough to set up that way before
but with the new module which allows you to hook it up to aquarium controllers it is pretty
easy. This is just a really cool pump that changes the dynamics of how we create flow
in the tank. The newest entry to the DC pump world is the
new wave from Neptune. You need to own a Neptune controller like the apex to run these pumps
but if you own an apex this is probably one of the more affordable options in this flow
range which is around four thousand gallons an hour. Similar to some of the other pumps out there
they are designed to be installed on the sides of the tank opposing each other and the apex
software provides all kinds of programing options. What makes it kind of cool is you
can use the apex software to use different programs at different times of the day and
different intensities. The flexibility is really pretty impressive. Even though they are designed to be installed
on the side of the tank they know you might not want to do that for various reasons so
they have increased the flexibility of the pump by allowing you two swivel the pump on
the bracket. Between that and physically turning the pump there is around forty degrees of
motion in any direction. Because the pump runs on the apex software
all of the programing can be done on your phone via fusion as well. Couple other cool
features of the wav are the auto power down, if it falls off the side of the glass or is
taken out of the water it should automatically sense this and turn off which is something
I have never seen on a pump like this. The wave also utilizes a single cord for both
power and control which goes to their control module which can run up to three pumps off
a single AC power cord to free up outlets. I have also heard rumors the pump’s one link
module will also have some cool features like a battery backup solution in the not too distant
future. One other quick option I will mention is the
new controllable xstream from Sicce. The only offer one controllable xstream pump currently
but it is in this fantastic ultra-small form factor. It comes with its own control box
as well as the ability to hook up to aquarium controllers variable voltage ports. Hands
down this is by far the smallest option of everything we talked about today so if you
are looking for the lowest profile option out there is nothing even close to this and
it’s an easy decision. Outside if powerheads there is another option
for flow with closed loops. I am not going to spend a lot of time on them because they
are very common these days because high flow powerheads have become so inexpensive and
small More or less a closed loop consists of drilling
some extra holes in the tank to create flow outlets and then using a large pump to recirculate
water in the tank. The most common pump for this type of thing is something large capable
of handling thousands of gallons an hour like the Reeflo externals. Biggest advantage of
closed loops is you hide all the pumps and cords so it might be a worthwhile option if
you are looking for the cleanest option. Regardless of the pump you select from any
of the options you have seen today you absolutely need to maintain the pumps and clean them
periodically if you want them to last. They are going to get covered in coralline and
other forms of algae as well as possibly get other forms of tank debris stuck in them if
you don’t clean them it is going to reduce their useful life and you will have to replace
them. I find this to be particularly true of the wet sides on the Vortechs, They will
last a lot longer if you maintain them properly and keep them clean. Cleaning them generally means soaking them
in some type of acidic solution like vinegar which will help dissolve the coralline. Hydor
sells some powder called magi klean which is a little lighter on the pumps. Tunze also sells a container of citric acid
for this purpose, again this is a bit lighter on the pumps than vinegar, and they also sell
a cleaning kit which is full of all kinds of little brushes and tools to clean your
pumps as well. It’s not cheap but if you don’t want to spend time hunting down all
these individual items yourself it is absolutely a time saver. Time to show you what we installed on the
BRS 160 for flow. With all this cool technology available it is pretty hard to make a decision.
The easiest way is to look at your desires for your particular tank. I want something
that is going to provide true varied flow which is going to contact the corals in many
different ways throughout the day. I also wanted something I could position in
different areas of the tank and aim them based on the particular aquascape we end up creating
and I need it to have a battery backup of some type because this tank is left unattended
every weekend. End of the day four Tunze Nano stream 6095’s
achieve all those goals for me. Four pumps are going to create that multi directional
flow on a six foot tank that’s just hard to achieve with only two. With two pumps the
flow may change velocities but it is often very linear. I also want the flexibility to
position and aim the pumps individually based on my aquascape and coral growth over time. I strongly considered the new Sicce controllable
extreme because of the ultra-small size but end of the day I couldn’t because I need to
leave this tank unattended every weekend and we need a battery backup option. The Tunze
safety connector is really the ideal battery backup solution for my situation because I
can pick my own battery size that fits my particular situation. With the safety connector a one amp battery
will run a sixty ninety five around an hour and fifteen minutes. For example this eighty
five dollar thirty five amp battery will run the pump for about forty four hours which
is what I need to get me across a full weekend without power. I got this one at batteries
plus which is in almost any market. They can also help you with an inexpensive charger
and they almost always have a ten percent off coupon so give it a quick google. It would
have dropped this battery to just seventy six bucks. One note on these Tunze sixty ninety five’s,
the magnet holders are designed for half inch glass so we had to get the Tunze extension
makes for this three quarter inch glass tank. Most of you will be dealing with half inch
or less but it is nice there is a solution out there for thicker glass. We selected the sixty ninety five’s because
they are the highest flow pump Tunze makes in the smaller Nano stream form factor. After
that the size of the pump takes a jump up. The sixty ninety five is controllable anywhere
between five hundred and twenty five hundred gallons per hour meaning we have up to ten
thousand gallons going on this tank. It is very likely we will really have half
of that once we tune them down a bit and consider half the time each one will be running on
the lower flow portion of the alternating cycles. So in the end this take probably will
average around a thirty times tank volume flow rate One nice feature is the cords can be detached
from the controller for easy routing. If you open the box there is a removable clip. Which
is particularly nice if you are like us and didn’t leave room for cords between the walls
and tank it is easy to get the cords through and we don’t have to drain the tank or drill
holes in the wall. I am going to run two on the sides linked
together, hopefully near the back and two on the back panel. I won’t know exact placement
until we create the aquascape. The other two pumps will be mounted on the back closer to
the middle and linked together as well and probably set a bit lower flow.
That’s it the tank now has a flow solution installed and getting closer to adding fish
and corals. In the next couple weeks are going to cover all kinds of stuff related to sand,
rock and aquascaping so don’t forget to subscribe and don’t forget to give the team here a
quick thumbs up because it means a lot to us. See you next week with week ten of the
BRS 160.

100 thoughts on “Week 9: Why flow is vital for a successful reef tank | 52 Weeks of Reefing

  1. This was one of the first "Yikes!" moments when I first began with reef tanks. Four, five and six hundred dollars per pump was outrageous, especially when you always have to have 2-4 pumps…or more!. For my small tanks (55 gallon and under) the inexpensive pumps do just fine, even if they have to be replaced every few years. For my huge tank (1,100 gallon) it was a no brainer to use a closed loop. It's the medium size tanks that are the more expensive gallon/pump cost for me. Like your 160, closed loop is a bit too much, but small, inexpensive pumps won't do the job either. Spending nearly $1,000.00 on just recirc pumps stings more than my anemones 🙁 But, you gotta pay to play and they cost what they cost, whether we think it's "worth it" or not. We have to have good flow.

    One thing that is great about the process is that BRS has such a fantastic assortment of products, almost to the point of being overwhelming to some. But the product/category filter is so fine tuned that you don't even have to get lost in the product until you narrow down your options using the excellent category filter. The education you get on this site coupled with their honest and unbiased opinion can make even the harshest skeptic a fan-boy. 🙂 Great job, guys. And tell your IT guys they're doing a great job on the site's layout and user interface. The newest iteration is very good indeed. (sheesh I rambled a lot)

  2. I could be wrong here but at 18:06 into the plumming video if you pause it . isn't that shut off valve on the wrong side of the check valve? if you had to take off the cap to the check valve for maintenance on the seals Wouldn't it flow water out from the tank through the lock line if you took the cap off? my 90 gallon tank isn't up and running yet , so just wondering.. This build video series is awesome btw! = )

  3. Just bought a pair of Neptune WAV circulation pumps from you guys, and it's like a hurricane in my 73 gallon Reefer 350. So I definitely have adequate flow. However, my corals are holding onto the rocks for dear life. I'm struggling with where to place them to get the good flow without killing them. Right now, they are on the back wall, near the top and in the corners, facing the front glass at a spot about a 1/4 way in from the edge. That diffuses the flow a bit, but it still seems excessive, even at only 1%. What would you recommend? Thanks again for the great information!

  4. Hi, I have a 120 gallon reef tank. I run 2 Tunze nanostream 6045s for flow along with my sump return pump. Could you give your opinion on this flow please? I have videos on my channel for you to see the aquascape and corals positioning. I think I might need more flow so I would welcome any suggestion. Thanks and love the 160 series!

  5. What wave-maker should I get that is affordable for a 36 gallon salt water tank. Also do i need a sump or skimmer for a 36gallon or can i get away with out ?

  6. Great info. I have been getting cyano and a lime green algae in one of the corners of my tank. It's a 6ft 180gl glass. My devils hand has grown three times it's size to the size of a basketball and attached to two large rocks. Other than re-scaping the tank , i'm not sure what to do about flow. I have two high flow hydros on the sides with one wave maker pointed in that direction to make currents around the coral, but it's touching the glass already so with that it's blocking flow. It doesn't get along with most of the other leathers so I put it in a corner all by itself, guess that wasn't such a bright idea. I didn't know it would get that large that quick. From the size of a tennis ball to a basketball in two years. Also, My 18in umbrella leather is suffering from the stagnant flow that used to circulate around the tank. Do you think my best option would be is to re-scape?

  7. I BOUGHT THE WAV SYSTEM AND IT TURNED OUT TO BE A NIGHTMARE. the one link was def  and it was replaced AFTER I paid for a new one and credited a month later and lost three expensive pieces of equipment due to the one link being defective, they will NOT do anything about the damage that it caused even though it was WELL documented what happened. sometime when you sell a new product things happen and you try to make it right its just a part of being a good company taking care of its customers. never again

  8. I'm running a Tunze Wavebox (back left corner shooting lengthwise) along with 2 Tunze 6105's for main water movement (One centered on the long back wall facing the front glass and one on the far right facing the Wavebox) in my 225gal (72"x24"x30")…just so you could get a visual picture. I have a 55 gal sump that has 2 Eheim 1262's feeding the water back into the tank. One at each back corner. Question is, when the lights go down, I keep the Eheim's on and shut down all of the Tunze. Is this a bad idea?

  9. Can you say why the gyre XF150 was not an option you considered? I am tempted to get one but I see you did not include it on the review and that has raised a concern on my end, can you explain?

  10. The Tunze 6095 with the controller that you guys used on your BRS 160 tank can it be connected and controlled by Apex?

  11. what would be the best option for my 180 gal reef tank that wouldn't blow my sand around i was thinking 2 gyre 150s but i would love your guys input on it

  12. Great informative video. That being said, you should know how to correctly pronounce a product company's name. Tunze is NOT "toons" …it is as follows: The German pronunciation is Toon-zuh, but it is typically pronounced Tun-zee here in the states. Just letting you know that is makes your credibility go down, from a consumer standpoint. Not hating, it is constructive criticism. Be correct, at all times….NOT the Billy Mays of fish goods. (good advice)

  13. alright so im starting up a new 30 gallon reef tank i have a protein skimmer built for 50 gallons and 2 hang on filters cycling an cleaning it at the moment. the one is used as a Refugium which i designed my self out of a 30 gallon filter. then i have another marine land 30 gallon filter with a bio wheel going as well. do i nee more flow i only have some zoas in there and im getting a new light and a new sump to hook up to the system along with a new 200 gallon protein skimmer

  14. Yet to watch one of your vids that isn't informative and easy to understand. By miles the best reefkeeping series of videos ive ever watched. Thanks for your efforts

  15. Why are the marineland powerheads not mentioned? Are they just crap? At their price point it is hard to not consider them.

  16. great info! i will be setting up a 20 gallon in a little while as my first saltwater. subscribed please sub

  17. I also use a y DIVERTER on my return and have 2returns ,, so it oscillates return flow from one side to the other.. This is a huge flow pattern "freebie" really

  18. 5:18 I like the idea of mounting a couple of pumps at the back, what pumps can I mount that won't have cords going up? I like the Vortech MP10s but they are 235$ each. What other similar pumps are out there? Can you control 2 gyres with one controller? Or can you use one gyre without it's controller using an apex?

  19. Thank you for the great video, I know this was posted a while ago but I'm a new reefer. Does anyone know where is the best placement for a single pump on a BioCube for softies ?? Thanks for any help 🙂

  20. Hi, great vid by the way, I recently bought the Nuvo 30L and I am wondering what I should get and the placement. I am mostly planning on softies, but I might want to get some lps corals later on. Thanks!

  21. It's all about the flow for proper nutrient transport. I try to make sure everything in our frag tanks gets good flow.

  22. I'm running a 40 gallon breeder and using a hydor 850gph pump and a water mover and having issues with rocks moving sand blowing ect should I remove the water mover and just use the hydor for my tank?

  23. what i wanna know is what is that green stuff in the water that shows the flow??? i mean this is great stuff and it really does show the differences in pumps but ive gone from hydor to gyre and now i have a gyre and the jaebo rw-8 but i still dont know what my flow truly is – can you use that green stuff once you have rock in the tank or no??? youll still be in the dark and basically guessing after you add the rocks and corals ???

  24. Hey , I'm doing an experiment for my fluid mechanics class , what material are those pellets used to show flow called ?

  25. Hello, i have a question in regards of type of flow.
    whats better, surge/gyre? or wave/pulse?
    i know at the end of the day that as long as theres good flow going threw the corals is good enough but i have a mixed reef. 1/3 leathers 1/3 lps and 1/3 sps. so i would love know what you guys at BRS prefer and why. please let me know.

  26. We have a new 20 gallon saltwater tank. Should we use a pump or a filter is enough? If we need a pump, is one enough and which would be the most suitable one?
    Thank you!!!

  27. Ayayay what a headache. I have a 25g tank and a fluval 206 that is producing very weak flow, most of the tanks circulation is so slow it almost looks like standstill. Tried to put in a 100gph powerhead and it turned my tank into hurricane Katrina. All the decor and plants went flying everywhere. It honestly bothers me for a tank this small to have to add on flow pumps. I am considering selling the 206 and replacing with a 406 filter. This is all so complicated it's making my head spin. Are there no very small pumps that have adjustable flow and don't take up a quarter of the space in your aquarium? These are so poorly designed if you ask me.

  28. i have a 10 gallon AIO tank that comes with a return pump. I have soft and LPS in that tank. Should i add a powerhead ? or the return pump is good enough already

  29. Would you guys recommend putting in a undergravel pump? I know the only time I would be messing with the substraight is when I do the water change and I know that won't get all the waste and food ECT. So I was wondering if this would be a good idea so it helps clean the substraight all the time?

  30. I am building a Biocube 32 in my classroom how much flow do I need I want to have mostly Zoanthids God of War, Armor of God,Bam Bams and maybe an anemone and clown fish

  31. In one of the many wonderful videos 🙂 Ryan talked about setting up a Gyre… I think it was in the BRS160, I think with Maxspects, and I think with Apex code. ON/45 minute ramp down/off. Can you please point me in the right direction for that video? Thanks!

  32. Just awesome series guys! Love the different vendors reviewed. This video could only be better if you had one of your charts like you do on other videos where they are side by side tested… Do you have a video for that? (power, form factor, gph, dc/ac, cost)?

  33. Love your videos! Really really helpful.
    I always find myself rewatching them from time to time to recap on the facts and figures.
    Would love to be able to buy your stuff online. Do you ship to the uk

  34. if you are looking for a all in one power out safety option. try to consider UPS or APU option from the IT section. these can be sized to your needs depending on the wattage and the expected time to cover.
    the main advantage here is a safe electrical installation without wiring on a car battery.

    none the less. thank you for your in depth overview. it is helping us a lot in making the right decisions for our first reef tank.

  35. I am currently starting a 5 gallon tank, do I need powerheads for such a small tank? even if it is not a necessity would it be beneficial to get one?

  36. Great Vid and always worth revisiting, I do have a question regarding settings for an MP10/Wave maker, if I need 2000lph flow and run in short Pulse Mode at about 1 pulse a second do I need to set the pump at around 4000lph to achieve the desired flow for the tank as the pump is only working 1/2 the time?

  37. Neptune wavemaker costs $499 so for 2 wavemakers I have to shell out $1000…just for water movement in a tank…WOW..😲😲😲😲 that's highway robbery… I can but a 150cc Honda Activa scooty for the same price here in India 😂😂😂 heck I can buy 25 grams of GOLD…..u know what I mean…just a food for thought..these hobby grade items are way way overpriced.

  38. You guys are way behind on your wavemaker selection. You really should carry he PP series by Jabeo. They demolish all of these in flow. Price is 1/2 to as much as 1/6 of many of these and although they won’t last a lifetime neither do $350 mp40’s. A $60 rebuilt pp15 lasts me 2-3 years. Even brand new they are still only $70. DC with controllers that can talk and sync with each other for gyre pulsing flow. Even a pair PP8 is enough to gyre across a 6’ tank. Did I mention they are 10x quieter then the MP’s

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