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Old 11-04-2010, 12:37 AM
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Default Trying to pick the right return pump

OK...I'm looking for the right reurn pump......75 gal FOWLR tank and a 30 gal sump.
How much flow do you guys think i should go for? I was thinking 700 to 800 GPH,but was told that might be too much with a 30 gal sump.

Herbie style overflow,with 2 x 1 1/2 inch bulkheads
Probably going with 1 of these http://www.aquacave.com/eshopps-psk-...tank-2859.html

Any thoughts? Any help would be welcomed.

Thnx in advance

Doug
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Old 11-04-2010, 12:57 AM
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Doug you provided a link for a skimmer.
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras



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Old 11-04-2010, 01:14 AM
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I know....I thought that what type of skimmer might help decide the flow.
maybe I'm wrong about that.

This is the pump I had in mind
http://www.jlaquatics.com/product/wp...ater+Pump.html
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Old 11-04-2010, 01:27 AM
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Well some people are hardcore with that saying that not to do more then the skimmer can handle. I am more of the biggest you can fit then throttle it back
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Old 11-04-2010, 05:16 AM
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Quote:
Originally Posted by BlueTang<3 View Post
Well some people are hardcore with that saying that not to do more then the skimmer can handle. I am more of the biggest you can fit then throttle it back
+1
the more flow you can get here means fewer powerheadsd in the tank. at least IMO
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Old 11-04-2010, 02:28 PM
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I have a 75G with 30G sump, herbie with 2 1" bulkheads. I run a mag 9.5 full out. that would likely be 7-800gph. seems to work fine.
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Old 11-04-2010, 02:34 PM
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Quote:
Originally Posted by ElGuappo View Post
+1
the more flow you can get here means fewer powerheadsd in the tank. at least IMO
+2
I'm also a fan of large turnover, a 75 gallon with that kind of drain can handle a very large turnover without causing problems relating to noise and micro bubbles. The only source of bubble problems would be from the skimmer, if the skimmer releases a lot of micro bubbles a higher flow rate through the sump may cause them to bypass bubble traps/baffles. However proper design and sump layout can avoid this quite easily, and choosing a skimmer which doesn't exhaust a large amount of bubbles is always a good idea. Skimmers which use diffuser plates and have larger diameter bodies typically do better at containing air bubbles.

I'd aim for at least 1000gph turnover, if you can go a little higher and hit a 15x rate at 1125gph even better. However hitting such a number isn't always desirable as typically you need to run larger external pumps which can create more noise. Usually you have to spend quite a bit to get a quiet pump capable of such a flow rate so this whole pump selection may be based on your budget. What is your budget?
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