well i knew about most of the things you have mentioned its just i been having some difficulty with some of my corals and i dont want to chance keeping it right now and risking my tank but this guy has been doing pretty good i guess i feed him phytoplankton and zooplankton about 3 times a week. haven't really had any issues with him since i got him sometime in december but just dont wanna chance it right now with my coral situation.