I currently have a 30 gallon soft coral reef and the cleaners in it is 1 scarlet skunk cleaner, 1 dwarf feather duster, and 1 margarita snail. I want to add more to my CUC and want to add 12 dwarf blue leg hermits, 2 mexican turbo snails, 1 more margarita snail, 2 cerith snails, 2 astraea snails, a black long spine urchin, and a lawnmower blenny. Is this an okay CUC for my tank? I know the urchin can get a bit nippy with corals sometimes but I'm going to supplement it with nori.