no that would effect the coral and inverts, I put in a couple of hermit crabs, and he is not interested in live fish. I have been trying to find glass (ghost) shrimp that i used to feed my lion to no avail. I tried yabbys (freshwater crayfish) and he doesnt go for them they actually walked right past him, i have tried different types of fish, whole bait fish and fresh fish from the fish market, also fresh prawns (shrimp) peeled and unpeeled also baby squid, and muscles. I am now soaking his food in garlic before trying to feed him and everything else in the tank is coming out for him, he just doesnt seem too hungry. He did however become more active when i put in the garlic soaked food so we backed off, left the room and came back to see the starfish, snails and crabs sharing the fish.