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Old 10-05-2011, 10:38 PM   #1
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Question Submerged Bio-balls

I am looking a different sump designs, and am wondering if bio balls are effective fully underwater?

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Old 10-05-2011, 11:53 PM   #2
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No. They support aerobic bacteria mostly and there is a debate as to their worth at all.

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Old 10-06-2011, 12:16 AM   #3
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I would just add some live rock rubble to your sump. LR + good circulation = best filter for SW tanks.
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balls, bio, bio balls, bio media, sump

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