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qquake2k
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Yesterday I took the Fluval 306 canister filter that's on my 46 apart to add some Poly-Fil. But now it's rattling. As far as I can tell, the rattle is inside the filter, not from one of the tubes or the cord.. I tried moving it around, and tilting it from side to side. Some air came out, but the rattle didn't change. Any ideas?