Hi Pat,
Your right, I was doing 2 water changes but the tank was not cycled, I had been using the Fluval Cycle in it though so I thought it was safe in that respect. No I did not test the water in the hospital tank. So I guess I killed my poor little fish :'(
Perhaps the use of the Prime, Fluval Cycle and Medication all at once was a toxic combination? I feel depressed about this now.