I have a 60 gal tank with one Jack Dempsy and a Firemouth. I am thinking of adding more fish but my Jack is pretty agressive. I may just add a mate for it. Anyway In my 60 gal I have 3 powerheads running my undergravel filter along with 2 - whisper 3 back filters. The total circulation for all of these is around 1000 gph. I guess my question is does anyone think this is too much filtration and to much water motion for these fish? I have also heard that you should do a 20% water change 2x a week. Isnt that a bit rediculous if you have proper filtration and a well established tank??
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