Tank-75g 110lbs LR 3 inch live sand bed I run a 30g sump with a coralife uv sterilizer and a berlin turbo skimmer. I also have a cpr aqautics hang-on refuge (large size).The tank has been set up for 7 yrs. I have a med. carpet anenome 1 large leather 1 large devls hand (both started as frags). I have a med. volitan lionfish and 1 damsel. This seems to be a light bio-load to me. Lighting consists of 2 150w 10000k halides 2 460nm t-5 54w actinics 2 420nm t-5 54w actinics 9 white leds and 9 blue leds. Corraline algae growth is great. 0-Po4 ,0-No2, 0-Nh3, ph 8.2, Ca 460 No3 is still high at 10 ppm. I try acro once a year and fail every time. I place then at medium height,they turn white!!! I place on the bottom, they turn white!!!! I put them on top, they turn white!!!!!! Should I just give up???? I would appreciate any input on this!!!