My betta has been with my new cories only a few weeks now. I've been dropping some algae wafers in for the cories and my cute little betta, Tiger, will eat the wafer right along side of them! I give him his own betta flakes and freeze dried bloodworms. Maybe he just likes the company. I try to distract him with bloodworms when I drop in the wafer so he doesn't notice it and overeat. I'll have to post a picture soon...he is very gentle with the cories! Usually bettas are finicky eaters, but not this one!