I have 5 polys in a 240 ranging from 8" to 18+". The Koloton is the largest, and is starting to bite all of the other polys. It is always the tail or a fin and he will hold on and sometimes shake when they try to swim off. I don't have my guys laying in a pile like everyone else. They are starting to just swim the other direction when he comes around. I tried overfeeding, but that isn't helping. Does anyone have any ideas on stopping this, or will it pass on its own? He has never made an effort to bite any other fish in the tank. Should I get someone even bigger to bite him? 
Jurassic Aquatics always seems to have ever larger polys so its a possibility.
Jurassic Aquatics always seems to have ever larger polys so its a possibility.