close loop

  1. H

    Pump size for 300 gallon closed loop system

    Any recommendations on GPH for a closed loop system? It has one 1.5" drain and four 1.5" return lines on the back wall of the tank. The display volume is 300 gallons. It has a sump with two overflows and four 1" return lines. Approximate head height is about 4.5 feet. I have the...
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