I don't run carbon. Just DSB, LR, a fuge, and a sump with a protein skimmer. The daily water changes could help, but when I go back to the normal schedule, I still will not have found the original source of the problem and it may start up again. I appreciate all the input and when I have the money, I will replace the bulbs as I think they are part of the problem.
What I would really like to know is if anyone has an opinion on the DSB being part of the problem.