So I had like 11 fishes and 10 of them died because I dosed the tank with ick treatment by ACCIDENT. So the goldfish I have left had a bit of fin rot and a kinda eye skin rot, (the eye covering is white ish) and it was kinda sick, I cleaned the water many times. Then I added sat and the fish got a bit better and the fin stopped rotting but the fish covering is still white ish. LATER it started swimming more, picking up rocks and spitting it out, Mostly staying near the bottom and the back of the tank. When I want to feed it, it wouldnt eat any of the food, When Im watching. Whats wrong, I had this fish for about 4-6 weeks now.