Hello all I have had this algae in my tank for a little over a month now. I have tried the blackout approach and have tried red slime remover and chemi clean and nothing works. Tank is 60 gallon cube reef ready. I have radion lights gen 2 over the tank. I use rodi water for water changes and my filters are good. I also run a reef octopus skimmer and a Gfo reactor. I do weekly water changes and nothing seems to make this stuff go away. All of my water parameters are good and lights stay on about 8 hrs a day and I do not over feed. I'm about to take all the sand out and start out with new sand any other ideas before I pull my hair out.