The Planted Tank Forum - View Single Post - cleaning canister filter
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post #7 of (permalink) Old 12-02-2012, 06:11 PM
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Join Date: Aug 2011
Location: NYC
Posts: 731
You should try to change at least 10 gals a week for a 40 gal. 20% water changes is the minimum in general for water changes, but 25-30% may be better depending on stock, plants, etc..
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