Okay, I am a little confused here. What color are your t5 bulbs and what color are your PC
If you have actinics (420nm) as your t5 bulbs, you would do well to swap them out for two ATI Blue Plus bulbs. If they are already some type of 460nm bulb, them leave them be. (Unless they are old and need changing).
If your PC
bulbs are 420nm, swap them out for some 460nm PC
bulbs. (Make sure you get the right socket type!).
The 420nm doesnt output much PAR especially if its a PC
bulb. Right now I have 3 ATI blue plus bulbs and one ATI AquaBlue Special and my tank is light blue. SPS
corals are under the AquaBlue Special.
You can support some LPS
if you so choose as well. I used to have PC
lighting back with LPS
, but switched to t5 when I got a crocea clam and some SPS