I am in the market for replacing a 240...the new tank I want to use canisters not a wetdry...had that on the 240...what it different. Think 3 fx5's is good enough for a 96x30x30 with sa/ca stock. I was looking at just slightly bigger 96x26.5x30tall and 2 fx5 and 2 Aquatop CF400 canisters but I might be able to squeeze out 30x30....so im thinking would I want another fx5. Or maybe I could do 2 aquatop cf500's in place of a fx5. I wouldnt mind the built in UV.