How big is your tank? What are you keeping? I would think, as a general rule, the return pump won't be enough. But I suppose it depends on the rest of the set-up and its inhabitants.
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~Drew
10G Nano * 10G Sump * Deltec MCE 600 Skimmer * JBL Viper 150w MH * Zeovit * Vortech MP40W
Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon. ~S. Ertz
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