Get some of the Jungle Labs Parasite Clear tablets and follow the directions. I've had great sucess with this med, and be sure to do 3 full treatments spaced 2 days apart. Jungle also makes anti-parasite food that you feed exclusively for 3 days in a row per week for 4 weeks. Do both the food and the Anti parasite clear tablets, and get this started like yesterday. If he truly has bloat you don't have time to sit and wait. You will also need to treat the entire tank that he was in, because bloat is very contagious and will spread very quickly. Be sure to vacum the substrate very thoroughly as bloat is thought to be transmitted by fish mouthing other infected fish poo in the tank. Try not to feed him for a couple of days and then start him on the anti parasite food, he may spit it out at first but when he is hungry enough he will eventually learn to like it.