jude Posted August 20, 2004 Report Share Posted August 20, 2004 I know you should 'vacuum' the gravel regularly to remove the muck but doesn't this interfere with the biological process of an undergravel filter? If it is supposed to 'digest' the rubbish then removing it must interrupt the process? Quote Link to comment Share on other sites More sharing options...
kim Posted August 20, 2004 Report Share Posted August 20, 2004 if you clean your tank every 2 weeks do a 20% water change , you dont clean clean the gravel you just tearn the top of it to keep it nice and add lots of cat fish . Quote Link to comment Share on other sites More sharing options...
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