I have a few questions before i get my octo tomorrow. 1. do i need to cover my koralias? 2. i have corals in the tank and need to know if any i need to move to a dif tank for octo saftey. a. rics, yumas, shrooms b. hammer coral c. tube nem d. kenya tree e. xenia f. monti caps g. zoanthids 3. will it eat sally light foot crabs? iv been picking them up for it but never heard of them eating them. (they were free) a. if not i have other things to feed it. 4. is it ok with a SSS (sand sifting stafish)? Thanks for the info.