01-23-2011, 09:17 PM
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IMO people make their return pump too big. if you cycle 5 time the amount of your display tank water thru your sump that's more than enough. so for 1000gph i would expect a 200 gallon tank and then a sump that can handle that flow. a 35 gal sump is not nearly big enough. yes i know the skimmer releases bubbles but if you have bubble traps and lower the flow thru the sump that would not be a problem. consider how much water your skimmer actually pumps into the chamber. it's probably less than 500 gals per hour. so you want to cycle about that amount through the sump otherwise tank water will fly pass and not even get skimmed and returned to the tank/ if you lower the pump size you'll save $ on electric and make the skimmer more efficiently skimming all the water returning to your sump.