Seized Posted September 21, 2020 Share Posted September 21, 2020 Idk how many people know about these prefilters but there amazing. I have one on my 20 gallon community tank. And its perfect for extra bio and mechanical filtration. The best part is is that they make three different sizes and they all fit almost any filters. The medium size one is perfect for 20 gallons IMO but the others would work just fine. If anyone is looking for some extra filtration i highly reccomend these. Link to comment Share on other sites More sharing options...
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