Regular Member JDMac2006 Posted October 13, 2003 Regular Member Share Posted October 13, 2003 all i know is that you hook an air pump up to it but how does this filter work? Link to comment Share on other sites More sharing options...
Guest loub Posted October 13, 2003 Share Posted October 13, 2003 The air flows up through the middle of them creating a suction which draws water through it. Then it acts as a biological filter. They don't remove a lot of solids but they do help remove the ammonia and nitrites. Link to comment Share on other sites More sharing options...
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