Hi was just wondering if it's ok to put a blue linckia in with a fan sponge. Also, I have a 30 gallon tank with 2 small clowns, a royal grammar and a cleaner shrimp. On Friday I am going to add 1 green chromis, and some snails. in the future I'd like to add a neon gobie, banggai cardinal and maybe in a year or 2 a mandarin. Does this sound overstocked or in your opinion or do you think that would be fine?