So the other day I received a zoa colony that had a small pistol shrimp hitchhiking on it. He's about 3/4" - 7/8" long and is mostly translucent gray with black bands on his midsection down to his tail. Would he be safe to add to my display or should I keep him in the sump/frag tank? Sadly, I also had a pink acro crab hitchhike with a small sps colony but I didn't see him till I dipped the coral in "all out" reef dip.... did what I could to save him but he didn't make it. Same thing basically happened with Mr Pistol but he recovered.