AquaClear Quick Filter Refill Cartridge for AquaClear Quick Filter Powerhead Attachment (A578) - 2-

be careful when you throw these away not to throw away the inner tube like i did. I also rinse it off once a week and get some pretty good extended use out of them.

Almost as effective as a diatom filter and much, much easier to use. None of the messy and time consuming diatomaceous earth filtering medium changes. Combined with occasional diatom filter use keeps water crystal clear.

Since starting to use this product my fish are more active and the water stays clearer, and apparently healthier. I give this my highest recommendation. Everyone should have one.

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Clears water extremely fast! I wouldn't want to run a tank without one of these. the only drawback is that it is pretty bulky (about 6 inches long by 2.5 wide).

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These are great! They attach to a (sold separately) filter that you can attach to a powerhead. Cloudy water is cleared in an hour! However, they do get dirty pretty quick and need replacement often. In my opinion, it's a small price to pay for crystal clear beautiful water.

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I use the quick filters in my water dragon enclosure. I love the quick filter for quick change outs. It doesn't get much easier.