Originally Posted by jato
Be careful during this period. A beta can go a week without eating so fasting for more than one day is ok, I would give him two or three days to let him clean his system. Otherwise he may remain bloated and if it goes on too long ascites may occur which is normally fatal.
Let him poop it out :)
Actually, a betta can go for about a month without eating. Not feeding them for a week when you're on holiday won't harm the fish at all!
OP: it's good practice to fast your fish one or two days in a week anyway, you should start doing that once the bloat is relieved. When feeding, feed one or two pellets at a time and stop offering food when his belly is slightly rounded - not
bloated. If his belly still looks full during next feeding, you can either skip it or offer a tiny amount of food, for example just a pellet or two. I do this sometimes as some of my fish can become quite stressed when they've not been fed at their regular feeding time!