so i bought a gold fish the other day to test out my water in my one tank. the tank had ick in it about a month ago and i have done some water changes and tried to clean it out, and now the gold fish is my experiment to see if the water is still diseased. so 2 questions.. #1. can gold fish get ick? right now he doesnt have any signs of ick on his body but he is acting sickly which brings me to my next question. #2. why does he keep floating back up to the top of the water quickly? he will swim downward and when he stops he floats up. is he dying? i havent really seen him eat in the past 3 days either and i have been putting small doses of food right by him a few times a day and he doesnt go for it.