Thread: sump ?
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Old 10-08-2007, 09:06 AM   #4
GoodMike
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Join Date: May 2006
Age: 22
Posts: 548
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bioballs work either way. submerged or just having water trickle over them. when my sumps (freshwater) are filled to the proper level, half my bioballs are submerged, and half arent. either way its fine.
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