08-30-2009, 04:18 PM
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Member
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Join Date: Oct 2008
Location: Sylvan Lake, Alberta
Posts: 274
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I would imagine that if you pointed your powerheads to create some surface agitation. As well as using a skimmer in the sump would provide enough gas exchange.
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Adam
 90 gal reef, 30 gal sump, Tunze 9015 skimmer, 2 X Tunze Turbelle Stream 6125, Coralife Aqualight Pro 2x 250 w DE & 2x 96 w PC, 9 w Turbotwist UV sterilizer, 2LF phosban & GFO reactors
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