I have a question about detritus cleaning. I have detritus on my sand bed and all over my rock. I have new growth coming out on my rock and I fear the detritus will kill it. Should I use a soft brush to clean the rock or get snails. I have hermits, 2 and a cleaner shrimp, but no snails yet. Its a 55 with a clown, and some damsels. How many snails should I get and what kind. And should I add more hermits or cleaner shrimp, and is there any thing else i should add to help clean this up. I'm desperate. Thanks for any reply.