So my hair algae problem has been going on for months in my 12 gallon. The tank is nearly a year old, nitrates and phosphates are at 0, I do weekly water changes, all other parameters are spot on, have a cleanup crew of several nassas, a cleaner shrimp, turbos, and a hermit, RO water, I tried sea hares and they both died within 3 days after not touching the hair, yada yada yada. I'm going to upgrade to a 30 gallon in the next month, but until then, I've got hair algae on all my beautiful live rock and some corals. My LFS guy said I could do a 36 hour blackout and says he did it with his corals and they were fine, is that a good idea? I did a water change today, blew my live rock off with a turkey baster and sucked as much detritus out as possible, then I pulled as much hair out as possible. I fed all the corals today too so they shouldn't be hungry. In all of my research on how to get rid of hair algae, no one ever mentions the blackout, so I'm wondering if there's a reason why. If 36 hours is too extreme, is just a 24/48 hour okay? Thanks!