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Old 01/14/2007, 08:51 AM   #2
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Join Date: Mar 2005
Location: Ridgeland, SC
Posts: 703
Will the return pump be in sump or external? The recommended flow through a sump is 3x to 5x tank volume. If this is for your 75 then 225 - 375gph would be a good pump for the return, after factoring out head loss of course.
The CL and return pumps can and probably should be different. You want a closed loop to provide the flow that your return is not giving you so it should be a stronger pump. Remember, there is no head loss on a closed loop so the max rating on the pump is what you will get.
The mag pumps do run a little on the hot side. Pan world, Ocean Runner, Blue Line, and Sequence all make good pumps.

We're just two lost souls swimming in a fish bowl..... Roger Waters, Pink Floyd

Current Tank Info: 150 Gallon Mixed, 55 Gallon sump, 35 gallon fuge
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