Please help me save me fish!?

[M-girl]

I have had this gold fish for about 6 months and it isn't doing very well right now. I changed the water last night, and this morning i found him drifting around, with his tail kind of bent looking and curved. I have cleaned his tank many times and he has always been fine, the other goldfish in the tank is doing fine/normal. He is breathing very slowly and heavily... I tested the water and everything was fine except the ammonia was high, which i think it always has been. Is there anything i can do to make him normal again, he has been like this for about 10 hours. Thanks!!!!!!!
Would it be ok to move him in to a different fish tank that has been cycled and has platties currently in it? would that be ok, or more stressful?

[Jessica]

It sounds like ammonia poisoning. If your nitrites and nitrates are both at 0, then your tank hasn't cycled yet. Two options to save him: Transfer him to an established tank (best choice), or you could try getting some ammonia detox treatment from the local fish store (don't guarantee that it'll work). Best of luck!