JSTR Posted March 23, 2005 Report Share Posted March 23, 2005 Know a couple of people running 100G tanks with only a pairof AC500, no hugeclarity issues but the bio loads arent that great. I personnally have a 77G with two AC500s and 18 really messing Malawi cichlids but never have I had an issue with water clarity or poor water parameters but bare in mind the filters get cleaned every 2nd week alternating. Shouldnt be a problem for the AC500 to handle a 90G just be diligent with your cleaning routine. IMO Paul Quote Link to comment Share on other sites More sharing options...
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