your feeding too much.
what brand of food are you feeding?
i prefer to feed 2-3 pellets 2x a day so they dont look like there gonna explode, and you can substitute the pellets for a meal of thawed frozen bloodworms or brine shrimp a few times a week.
remeber bettas are very small fish, they dont need much food to survive, its better to feed a little less, then too much. it is your job as the owner to say no more food! your full! because trust me, they will never stop eatting. lol
im not saying you didnt clean his tank enough, but usualy thats how they get fin rot, from dirty water, witch can be from feeding too much. also some fish dont eat every time you try, dont worry unless its been a few days without eatting.
Last edited by kjg1029; 10-23-2014 at 06:58 PM.