I am wondering if anybody else has had this problem I have a 16 gallon tank that i have had fish in for about a month now. I have a lovely male betta, 3 zebra danios and 3 harliquin fish. They all got on wonderfully, the harliquins are little so and so's with the betta. I was wondering what else to put in to complete the stock and on doing lots of research i decided on cory cats. Everybody seemed to agree that they get on well with male betta's. HE TRIED TO EAT THEM!!! I had to put him in a glass bowl {from the kitchen, my husband wasn't impressed} and go and buy a little thing to float in the large tank for him to live in. I am planning now on going and buying him his own small tank. Does anybody else have a cory cat killer? I thought they were supposed to get on well!!