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Unread 08/18/2011, 10:54 AM   #10
cloak
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Join Date: Jul 2000
Location: Stockton, CA
Posts: 14,854
The GPH on those Koralia pumps are notoriously inaccurate IMO. I use a Koralia 1 to mix water in a 5 gallon bucket and the water hardly moves. I can't imagine using that in a 10 gallon tank as my only circulation pump. I can see the scum on top of the water now. You might want to consider either upgrading or adding another powerhead.


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