I'm trying my mala with a pair of convicts to see how he does with tankmates. I put them in about a week ago. The first night I put them in the mala hit the male convict (about 4") a couple times but I don't think he was going for a kill, more like a warning snap. The teeth marks have healed in the convict and the mala seems to ignore them now, even when they come over by his driftwood. Now the true test is going to be when they breed, once the cons turn aggressive towards him it could be all over. But thats why I'm using Cons to test his aggression towards tankmates, I need to see his reaction to aggressive fish. I'd love to be able to keep him with some other fish.