I have been keeping sps for a few mos now (some frags over a year). I have some digi some caps a few acros slimer ect simple stuff. everything is doing well. but i want to step it up a bit any suggestions on a mid level sps if there is even such a thing. tank has been running for years now im very strict on my param for this tank i just want to go forward any advise would be appreciated Tx Rick