what medication are you using?
what are the exact instructions on the bottle?
did you re-dose after the 50% water changes?
when was the last water change before that and how much was it?
did you remove the carbon from the filters?
did you remove the filter pads from the filters?
what size is the tank?
what are the exact instructions on the bottle?
did you re-dose after the 50% water changes?
when was the last water change before that and how much was it?
did you remove the carbon from the filters?
did you remove the filter pads from the filters?
what size is the tank?
