I run halides, 2 purple, 2 white, and 2 blues on the t5's for tank in question. I'm guessing take the blues out or run them for a shorter cycle to see if that helps.
Lol, its about a half a inch thick on my walls of my frag tank. I know its affecting the chalice and acans its hard to keep my calcium about 350 and i want it at 475 to 500
try buying like 10 lbs of live rock from your lfs. just be sure its all purple or have a friend lend you some if its possible leave it for 3-5 weeks. it will grow trust me.