i have a 90g tank with a 20g sump, i have 2 48'' marineland LED reef capable strips total 0f 6680 lumens. my current water parameters are P.H.-8.2 Nh3/Nh4 -0ppm No2 -0ppm no3 0ppm calcium approx 460 ppm tank has been set up since aug 2011. its foot is buried in the sand and has been since i got it 3 weeks ago. i am feeding it krill/brine shrimp/myces shrimp. and no nothing has changed. i bought it from a VERY reputable dealer here in NJ. its has looked great since i got it 3 weeks ago, my reef has a wide variety of soft corals (i.e. star polyps, mushrooms, torch corals) and inverts which are all uneffected. if there is anything else you can think of please ask your help is greatly appreciated.