I have a chalice which has been in my tank for a few months. It's been showing growth. This past week, a white spot formed on part of it. The white spot appeared within a few days of a lighting change. My question is, should I try to ride it out, or make a few frags. It is roughly 5cm in diameter. The white spot can be seen in just left of the center mass.
If it looks like it gets worse, I'm going to bump my lights down, and try to ramp them up.

