Betta fish and fresh water tank mates
recently i had put my male betta in with 2 danio's and 2 cory cats. everything was fine they got along really well. the next day however my betta had a very swollen abdomen. all i could figure was that he was eating too much of their flakes so i put him back into his solitairy tank. this concerns me considering i was planning on getting some betta felmaes for the bigger tank and am afraid they will experience the same thing as my male. the only difference between the tanks was that the bigger tank has a filter. any suggestions would be great.