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Why is overflow needed?
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01/10/2008, 07:38 PM
khoile
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Join Date: May 2007
Posts: 33
Why is overflow needed?
Hi I saw all reef tanks seem to have overflow, why is this needed? Can't I just use canister filter? I know extremely small tank doesn't use overflow, but it seem like 99.9% of tank out there have overflow.
khoile
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