4 out of 5 of my goldfish!!!
Ok, I brought them in for the winter. They were fine for several weeks, then out of the blue, 2 of them die! Several more weeks go by, and this morning I found one of them dead in the tank. The other 2 seemed ok....but this afternoon one of the remaining 2 fish started swimming crooked. Now he's dead too. They all seemed healthy until they died. No ick, no water changes, same food, same temp.....what could it be?