I have a 50-gallon saltwater tank. 90% live rocks and white live sand. Set up 2 month ago. I was off to a good start until now. I’ve had 2 clownfish, 1 yellow tang, three damselfish two was blue and one was black/white stripe, and one pork fish and 1 seahorse…. Plus 2 snails, 2 hermit crabs…...