For the record I never did a blackout to beat this stuff. Just be diligent on the cleaning and GFO regimen it only took two treatments of GFO for me. I now no longer dose stump remover or phosphorus into the tank. I removed half of my Chaeto and added a bunch of smaller macro algae and added a auto pellet feeder. The majority of the new pellets are. Or eaten as it's too big for my fish. My cyano bacteria problem is mostly gone now but I keep at it by cleaning it out once a week with my water changes in my refugium where it grows. I'm starting to get some green hair algae in my display tank now that will go away with a fresh cleanup crew I'm ordering.