I have a 120 mixed reef with Eco-Tech LED lights and pumps. 4-5" sand bed. Plenty of live rock. I've cut down on feeding quite a bit. I've lowered my light cycle to 50% for 8 hours a day. I run GFO, Cheato, and ESV carbon. I have great flow in my tank. I change and bleach my filter socks at least every 3 days. I do at least a 25 gallon water change every 7-10 days. I have 7 small fish, and plenty crabs and snails. My tank is not near a window. I have tried everything. HAIR ALGAE KEEPS COMING BACK! Any ideas? I'm all out. Thanks.