Ugly phase just started. I spotted some brown spots on the rockwork 2 days ago (I am 99% sure it’s diatoms). I know not to go crazy trying to get rid of them/overreact, but what should I do. Currently, I have no CUC, no refugium, and I run the light for a small amount of time. Should I just let the ugly phase do its thing, then hopefully die off? Or should I take some course of action?