Aw, bummer - sorry to hear that Onion! I have a couple that have just paired up. Don't know if they'll breed in there or not though... By teaming up they've taken control of the tank (from a juvie trimac that's bigger than the male FM), but as Mystix said, they're much more bark than bite. A pair of con's will do a lot more damage. Not even nipped fins to report in my tank thus far.