I got a pair of false perc clowns and one of them has popeye that has gotten better the past 2 day but he is still breathing fast through his mouth and does not eat. Im setting up a hospital tank and will use the tank water when I do a water change today. Anything I should do/not do when setting up the hospital tank? How do I prevent a spike in Ammonia? What medicine should I use to get him eating again? Thanks for your help.