I have a queen in a 300 stock tank it has wiped out the aptasia that was in there . It has been a month and no bad stuff yet have a few sps and some softies ,duncan .rbt nem and zoas.
Have a 6 inch Queen in a 180 with all kinds of corals, RBT's and gorgonians. Has not bothered any of them but I think it is an individual fish situation and only you can decide if it it worth the gamble.