your light output most of the time is based on the size of your ballest. For a tank that small, you should upgrade to NO
lights and you will have a tremendous amt of growth...AND to improve the LR
colors even more, add calcium too.. Im like you I didnt realize the importance of lighting.
Atari is right, the bulb(s) need to be changed. I had my NO
flor lights for a year and my rock started fading too...I upgraded to VHO
lighting and now I have purples all over the place!! But it does take time too!!