I know it is a cliche answer, but I think your lighting is bit weak. A 4 bulb T5 fixture might not cut it for optimal color in acros, especially since 2 of your bulbs are actinics. I would much prefer a 6 bulb ATI or any 8 bulb unit over a tank of that size and depth. HTH
I've kept colorful SPS for years and this comment wins the kewpie doll!
