Petco Power Filter 5 Replacement Filter Cartridges

These filters are exactly the size I needed for my fish tank. I'm truly puzzled as to why my local Petco doesn't carry these since they sell the fish tank.

These are the standard replacement filters for the Petco 5 gallon hexagon tank. They recommend you replace them every two weeks, but I've found that as long as I do partial replacement of water regularly, I replace the filters once a month when I do the full tank cleaning.

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