I did have Live Sand, and Live Rock in the begining when I first started my setup in 2003. Now I just have crushed coral in my only tank setup which is fish only. I am starting a second tank to have a SMALL fish only aquarium which I will be able to keep my crabs, snails, shrimp, etc...alive and not eaten! My fish now are big and are aggressive. They eat crustaceans, and any fish they can get.
Currently I have 3 fish
-Sailfin Tang
-Niger Trigger
-Spotted Grouper..He likes to eat!