So, decided I’d done all I could do on my cyano through filter changes, reduced nutrients, and general tank cleaning and got rid of lots of it but then found some chemi clean in my closet (from last tank purchase) and reviewed it and decided to use. Then Crash! Ammonia spike, likely from dead bacteria? Bristle Star first to go painfully, some birds nest, pocci, almost anything SPS, small monti, etc... euphylia probably dead. Moved worst corals to qt. Anybody used this stuff and had better luck? I followed the instructions very closely, actually only used like 2/3 recommended amount. If anywhere in their literature it said (2% chance you’ll lose half your stuff) I never would have tried it. Luckily most just getting into SPS, and most of my LPS and SPS wasn’t expensive. So far my anemones, zoas, leather, gsp, Xenia, and even a couple acro look fine.
I seem to have stabilized the crash and the carbon, skimmer, filter cleaning, and water changes are doing the job, but What?