Welcome, just to add my two cents.... Hold off on adding any more live stock until you have added all your live rock that you want and the tank has cycled and stabilized. Patients, patients, patients.... I always believe if you take care of the water, everything else will take care of itself. If you are looking for an RO/DI unit, take a look at the Typhoon III at
www.airwaterice.com
Good luck and take your time,