I feed bloodworms once or twice a week except when I'm conditioning - and then I feed them every second day with no ill effects. I am very, very careful when conditioning though... it's a pain in the butt, I have to go running off to feed the bettas every few hours... I give them basically what I always do, just four or five times a day. I feed peas if they ever get constipated and I also skip feeding one day a week except when conditioning... when i am conditioning them I load them up on banana (yep) and then live mozzie larvae. Never seem to have problems with this.