My goldfish is still alive. He has a small patches of icy from a previous sickness. I know the water paremeters are: water is hard, oh is 0.0, nitrate is 0.0, nitrite is 1.0. He is just inverted at thr top I dobt know why. He can still swon up and down and still eats well. He shows no signs of bloated belly or a parasite. Because of nitrite I water change 50% twice a week and only feed every other day. Please I dont know what to do. I also dont know how much time he has left. Thank you