I have a 150g reef. 300 lbs of live rock. 3 fish and a few dozen corals. I have 4 1050 power heads and 2 500 gph pumps as returns. I have a skimmer and phosphate reactor with extrax phos . Lights are on 8-9 hours per day. And ro water changes mostly weekly. Sometimes every 2 weeks. Ro is 0 tds. No phosphates or nitrates in ro.. I have a deep sand bed and hair algae on everything!! Rocks and growing in my sand.. I cleaned every rock in hydrogen peroxide. And sucked out the top of sand bed multiple times. And it's all back in a few days.. Anyone else have any ideas on getting rid of this? I think I'm going to pull all corals and store in a seperate tank. Pull all rock and soak in h202 and black out in a tub. Cleaning weekly. And black out the tank... Any other suggestions?