I am growing 2 in my 75g community tank. As the previous posters have suggested - they love to eat, have great personalities (each one is different) and grow like crazy with heavy water changes. So far both mine are not aggressive - but that all depends on stock, tank size, conditions, etc. (in my experiences at least) - I throw both of them in a 10 gallon tank and they would kill each other at their size. I think that is why most LFS are hesitant with these fish, they prob have a ton of people buy them - drop them in their 25 gallon community tank at the house and come back to the LFS very very confused...lol