I'll keep my eye on this one. Thanks for the heads up. I'm hoping my green texas, festaes, and bleekeri will keep it in check.He will be fine with tankmates until he decides he isnt. Then they will all get killed in a night. Probably when he is around the 6" mark. I got mine because the lfs sold him 3 times previously to people with 55-90g communities and 3 times he wiped out all other fish randomly and 3 times he was brought back to the store. I kept him mostly solo. Id keep a half dozen rosie minnows and he would tolerate them for months up to about 8 then kill them all in an hour randomly. Careful with butti they are killers