What's your turnover rate in your sps tank?

[Aquatron]

My DT "Turns over 10 time an hour" My sump " Turns over 30 times an hour" My DT "Additional flow....not turn over and not including above 11,000gph.

 

[ClownNut]

185G
2000G from return
6105X3
6095X2
will add one more 6105 later.

 

[xenon]

From my experience, more flow is not alway better.

I am SPS dominated and all I have is 1 MP40 @ 50% on reefcrest mode and 1 Tunze Nano wavebox.

The wavebox does not produce much flow but that back and fourth motion from the 1.5" wave is so effective that it makes up for the limited flow from my MP40.

 

[SNAKEMANVET]

On my 75 gallon I run 2 mp40w es at about 75% on reef crest.

 

[gbru316]

From my experience, more flow is not alway better.

I am SPS dominated and all I have is 1 MP40 @ 50% on reefcrest mode and 1 Tunze Nano wavebox.

The wavebox does not produce much flow but that back and fourth motion from the 1.5" wave is so effective that it makes up for the limited flow from my MP40.

your wavebox is moving water in the tank.... for all intents and purposes, it's considered flow

 

[xenon]

your wavebox is moving water in the tank.... for all intents and purposes, it's considered flow

That's right!

But when you calculate how many gallons per hour my wavebox contributes to my overall turnover rate, its VERY low.

 

[Allmost]

From my experience, more flow is not alway better.

I am SPS dominated and all I have is 1 MP40 @ 50% on reefcrest mode and 1 Tunze Nano wavebox.

The wavebox does not produce much flow but that back and fourth motion from the 1.5" wave is so effective that it makes up for the limited flow from my MP40.

well first sentence is not fully correct

have you tried increasing flow, and your corals got worse, so you concluded that more flow is not always better ?

from your experience posted above, seems like you meant to say REALLY high flow is not a must ... which is 100% true

the back and forth [random] flow, increases mass transfer by 33% !! Ill link the article here.

more flow, your corals would grow bushier and thicker .

 

[gbru316]

That's right!

But when you calculate how many gallons per hour my wavebox contributes to my overall turnover rate, its VERY low.

In reality, a pump rated at 100 gph moves more water than 100 gph due to interaction with the water in contact with the propelled stream.

Additionally, turnover rate doesn't factor in flow that isn't linear, as in the case of the wavebox.

So when asked about turnover rate, you're correct, can't factor in nonlinear water movement, but that doesn't mean it doesn't count as flow.

Turnover rate is only used to make measurement easy. The truth is, turnover rate isn't important, it's flow that counts, volume more than anything.

Since most of us lack the mathematics/physics backgrounds to adequately determine exactly how much water is moving in our tanks, we resort to turnover. Allmost and I were discussing calculations of flow via wavebox in a different thread a few days ago. Integrals, amplitude, frequency, and other fun enginerding/math/physics terms. :wildone:

 

[xenon]

well first sentence is not fully correct

have you tried increasing flow, and your corals got worse, so you concluded that more flow is not always better ?

from your experience posted above, seems like you meant to say REALLY high flow is not a must ... which is 100% true

the back and forth [random] flow, increases mass transfer by 33% !! Ill link the article here.

more flow, your corals would grow bushier and thicker .

I have tried to increase the flow of my Vortech MP40 and anything above 50% my corals get pounded by flow.

I doubt that 33% increase from a wavebox is accurate because it would depend on the size of the wave.

 

[Allmost]

I have tried to increase the flow of my Vortech MP40 and anything above 50% my corals get pounded by flow.

I doubt that 33% increase from a wavebox is accurate because it would depend on the size of the wave.

I dont think you understood what I meant

1. pounding corals with flow is ALOT different than having High flow in tank ! put a Maxijet pump in front of SPS and it will loose tissue, but you can have 10000 of them in a tank providing flow indirectly I have corals IN FRONT of MP60 at 100% healthy corals, love it.


2. BACK AND FORTH water motion increases MASS transfer by 33%. not flow. but MASS transfer. Not your wavebox or my wavebox lol I am stating a physics law here for you, flow in one direction VS back and forth flow ....

and to back my statements up :

Water flow is more important to corals than light.
Part 1. Introduction to Gas Exchange
Jake Adams
Advanced Aquarist Online
June, 2006
http://www.advancedaquarist.com/2006/6/aafeature2


Water flow is more important for corals than light.
Part II: The science of corals and water flow
Jake Adams
Advanced Aquarist Online
August, 2006
http://www.advancedaquarist.com/2006/8/aafeature


Water flow is more important for corals.
Part III
Jake Adams
Advanced Aquarist Online
September, 2006
http://www.advancedaquarist.com/2006/9/aafeature2/view


Water Flow is More Important for Corals Than Light
Part 4: Basics of Hydrodynamics
Jake Adams
Advanced Aquarist Online
November, 2006
http://www.advancedaquarist.com/2006/11/aafeature


Oscillatory flow through submerged canopies: 2. Canopy mass transfer
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 110, C10017, 14 PP., 2005


Hydrodynamics of Coral Reefs
Annual Review of Fluid Mechanics
Vol. 39: 37-55 (Volume publication date January 2007)
DOI: 10.1146/annurev.fluid.38.050304.092125

I have alot more studies like this, but Jake adams sums it up well in his 4 articles.

 

[glennr1978]

Actual turn over, sump to display, is probably about 250-300gph. I like to maximize contact time with filtration. That stated, my display has an mp10, and an mp20 (~3500gph). My sump has the skimmer pump and overflow in the skimmer section, modded 6025 (~1000gph) in the return / frag section, and a koralia 3 (750gph) in the fuge section. So at ~5500gph my 65g total water volume system is moving a good amount of water. Just not much from the top to the bottom...

 

[AcroporAddict]

465 gallon bare bottm SPS tank, 96" x 40" x 28". 4x MP60s (2 on right side, 2 on left side), and 2x MP40s (on back of tank). 100% maximum set on Nutrient Transport Mode. Tank bottom is so clean. Reeflo Hammerhead Hybrid return pump with the Barracuda impeller installed.

 

[coralreefdoc]

Love the flow specs, AcroporAddict ! Sounds perfect

 

[AcroporAddict]

Love the flow specs, AcroporAddict ! Sounds perfect

Thanks. Tank is relatively new, about 3 months old. I transferred the contents of a Marineland 300 gallon DD tank over to it.

Here is a video showing the Vortechs. The flow is crazy. It causes these small dirt devil like tornados on the far right and left sides, and they can lift small coral pieces off the PVC bottom up into the MP60s intake.



http://www.youtube.com/watch?v=atR9qWTtr4g&feature=youtu.be

 

[coralreefdoc]

Nicely done, David ! That aquascape is fitting with all the multidimensional aspects, and is complimented favorably by the ideal flow specs for your specific dimensions/coral species ...

Those Cirrhilabrus/Pseudanthias are indubitably on Cloud IX in your Reef

 

[Nano sapiens]

I'll probably be the 'low-low' guy here, but considering it's a small 12g...20x. I use just a return pump and a Hydor oscillator. Have had Montis in the tank for years and a few Acros for the last three months that are doing quite well.

A larger tank, of course, requires a higher turn over rate for most Acros to be happy.

 

[chercm]

i have a 4x2x2 tank and 1x vortech mp60W is it enough flow in my tank .

I set the mp60W at reef crest 30% and return pump 1260

 

[chercm]

how much flow is enough or too much flow for my tank ?

 

[Bugger]

checkthe flow calculator on the eco tech webpage

 

[chercm]

here is the result does it mean i need to increase to 50 % ?