I have had my kisser for about a year now and he is only 6in, I do w/c weekly and he will eat anything I put in there food wise. I have a Paradise Gouramis with him along with a Potbelly mollie, clown Loaches, and a CAE, used to also house 2 Leporinus Fasciatus also and I have never had a prob with the Kisser going after any of them, I have come to find out though keeping more than one kisser can be tough I had two to start and one took the other out but after that he has been a great fish and a good tank mate. My paradise, mollie, and kisser school together.