Hi guys, Could someone please confirm if this is the dreaded dinos? Struggled with diatoms and what looks like dinos ever since I had to move my tank 2 months ago. I’ve now had to removed the the sandbed and doing as much manual removal as possible by blasting rocks each day and rinsing floss. Also tried chemiclean which helped with a bit of cyano and ran actinic only for 3 days or so. Never had this in any of my reef tanks in the past. I’d like to know why it happens as peramters we’re always good until I moved the tank. I’m guessing it released some phosphates and nitrates from the 2 inch sandbed. Coraline hasn’t managed to take off very well so far so I’ve just blended and added some from my bros tank. If hydrogen peroxide is the way to go then I’ll certainly give it a try.