I’d like to know if my tank is okay, over populated, or under population when I comes to CUC. I have a 29 gal and a 10 gal refugium. Currently I have 1 turbo snail, 1 pencil urchin, 7 hermits, and 2 emerald crabs. I’ve added nirite snails but they die shortly after adding does this mean my CUC is full?