The Planted Tank Forum - View Single Post - Bio-Balls in a canister filter?
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post #2 of (permalink) Old 01-19-2013, 12:42 PM
Algae Grower
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I've used these in assorted canister filters for years on my 55g. They provide surface area and flow seems alright for me. They probably are not the best "most surface area" and they probably do work better in a wet-dry, but for me they work well, are easy to clean, and I had them on hand.
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