Originally Posted by crister13
I have an 8" grouper so I don't really think it'll be an issue lol. Also a 1.5' eel. So the lobster should leave the new fish alone after 3 weeks in the tank? Sorry just really want to make sure and I don't want to kill fish.
There isn't any way to be sure he won't kill the clown. The best predictor of future behavior is past behavior. On the one hand he doesn't kill established fish, but he does kill fish. Any way you approach the problem will come with the chance that you'll loose a fish.
Size may be another factor. He may not be killing the eel and grouper because they're so large. Add the biggest tomato you can find. Another thing you could consider would be *gasp* to cut off the end of his pincers before you reintroduce him to the tank. He'll still be able to feed but won't be able to kill until he molts. By that time he may be used to his new fish neighbors. It may be cruel but it's less cruel than letting him kill the fish and in the end he'll regrow his weapons.