Should I clean it off? And if so how? I have perfect water parameters, and cut back the lights a little, by about 4 hours less then they were on. I still notice a little growing on them. Whats the best way to clean it off?
You could try using a soft toothbrush, by supporting the underside of the leaf and gently sweeping the brush over the brown algae. I've done this with some success.
Andy