I think I'm starting to have this problem too. I don't have many SPS, just a red planet and an efflo, but neither have shown much growth or colors. The red planet has grown just a bit, but I can see the colors have started to recede. I can see new branches forming, but they are solid white. I'm thinking I'm missing some trace elements. Not to say I have been neglecting my tank, but I have been kind of leaving it alone to run it's course while I have been building the 210.

The article linked above leads me to believe I am low on potassium, but I'm not convinced yet. I don't check params often, but when I did 2 weeks ago everything was spot on and nitrates were undetectable. Maybe the tank is too clean as some have mentioned in previous posts?

Tank rundown: 29g, marineland 100 skimmer, 96W T5 with10K/actinic bulbs. Sumped with fuge, emperor 400 in DT and a few powerheads. Not currently dosing any trace elements.