My yellow tang has small black spots all over him. I have a tang, clownfish and a Bangaii Cardinal. And on my live rock I have about 6 "blue legged crabs" and I have noticed a great deal of worms in the rock. One large orange one with spike and black and tan small striped ones. What should I do without killing my inverts.. I dont have a qt tank. Ive had the tang for 3 month and he was the last fish I added.