Hi,
I will be honest, I don't know what causes hair algae. A lot of people quote the coolaid version(water changes,strong skimming,
water circulation, ect.). From time to time I have had hair algae but it seems to go away on it's own. Why? I have heard from other reefers who tried everything and could not get rid of it. Is it water, light, live rock type,water circulation,Vitamin C, Mag levels? Combo of all of these? People who have eliminated hair algae for more than a year please chime in on what you did. I would really like to know.
Dave