brown roots, is this from light getting through the lava rock?

trichomes;1592593 said:

thank you soryy this is posted in 2 areas, I think, still learning, I've been using peroxide to clean, but it comes back the next day, water changed weekly, ph 6.0, res. painted black, did not help problem, I will add smaller lava rock, I think the brown algae is from light. PLEASE HELP!!

Click to expand...