Looks like you are still looking for that perfect T5 combo. I would try replacing at least one of the UVL SA with an ATI Blue Plus (20K look but with a ton of PAR) and replacing one of the UVL 50/50 actinic whites with an ATI Aquablue Special (11K). Something like this (you have the 5 bulb TX5 if I remember right):

Front
UVL SA
UVL Actinic White or UVL 75/25 (14K)
ATI Blue Plus
ATI Aquablue Special
UVL SA
Back

I have an ATI blue plus, GE 6500K, and UVL Aquasun (10K) currently not in use if you want to play around with them to see how it looks. Grim Reefer's T5 thread on RC is also a wealth of info. -Bill