Dying Catfish...Help!!

[smithrc]

Your amount of tank cleaning sounds worrying to me, it should be a 20% water change per week minimum for any size tank and you should be gravel vaccing your tank at least once a fortnight;

Youd have a heart attack if you saw our maintenance routine....

25% - once a month. and even then its only to replenish nutrients and vacuum poop.

our stats dont shift from 0 in any of our tanks (we have 6 running) - you just have to have good filtration and live plants (to remove the nitrates naturally) they will also