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Old 07/22/2005, 05:40 PM
Anthony Calfo Anthony Calfo is offline
Parapterois heterura
 
Join Date: Nov 2001
Location: Pennsylvania
Posts: 5,141
the sump loop can be rather slow and quiet. There is no hard and fast rule for minimums/max. You'll find that even the smaller duty pumps that will handle the job long term of even 4' head from the floor to the top of the tank, for example, are still going to give you at least 800-1000gph (as with a Quiet one, Mag 9, etc). This is a reasonable amount of flow for typical home aquariums 55-180 gall. And its more than enough for a skimmer to process organics.
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