NO trouble here- even leaves the small green chromis alone. Granted all fish are giving him room- but he is alot bigger than they are. the Kole tank was holding his own and even being aggressive toward the trigger- but now the trigger is definitely the king of the tank. And yes- I hav e2 maxima clams and a cleaner shrimp- ignores them - the shrimp was cleaning him the other day. Although I may have poisoned the tank today getting ready for the frag swap Saturday. I will be setting up a 10 gallon tank up with a heater/light/pump to place corals and maybe fish in - going to Salty afterwards. Checking a old heater and it leaked and was orange/brown inside full of water and no doubt some leaked out into the system before I saw it- only in the tank for about 10 minutes, but hte softies all reacted badly - the green slimer and the pink millie are all putting out a lot of slim coat. if I loose this trigger, clams, ricordia, etc. I am going to kill myself for being too cheap to just buy a new heater.