cichlids and one large Pleco.? About two weeks ago I did a water change, about 50%. I now realize that was too much but now my fish are lethargic and rubbing themselves on the rocks. I have one black fish and he has a white spot on his fin. I had my water tested and they said my nitrates were high. They gave me Jungle Lifeguard all in one treatment. Will this hurt my pleco? What do I do to make my fish better?
The white spot looks like cotton
The white spot looks like cotton