10-28-2011, 09:37 AM
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Originally Posted by gmate
The output of the powerhead on the return line, should that be based on a neccessary flow rate for the total gallon amount of my reef system, or should it be based on the length of the plumbing from the return line to the tank?
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Can't be a powerhead, it has to be a water pump that has is rated at a certain gph with head loss. You want that pump to as closely as you can, match the gph coming into the sump. You calculate the pvc and bends in the return line for headloss to get as close as you can.