sahin
Ultimate Reefer
I have a 8 bulb 24", I run mine 7 hours, and 4 hours for the 2 T5 channels, and 10 hours of LED at 20%. I am still having trouble getting good color and growth. A lot of thinning or pasteling, some bleaching. Light is 10 inches above 50 gal cube. Could I be putting too much light on these guys still?
I have the same unit over a 47G tank. For sure the unit puts out a lot of light...however at the duration and intensity you are running, that is comparable to a good T5/MH combo.
I'd look at your water quality/ensure there is enough food for the corals.
Pastelling/bleaching can be due to too much light, but in a healthy system, its usually the corals right at the top that are affected.
However, tissue THINNING for me most definitely points to other problems. Have you checked for AEFW's?
Pastelling/bleaching/THINNING are classic signs of AEFW's. Doesnt mean that thats what is affecting your corals, but just saying...it'd be wise to baste a few corals outside the tank.