[x]1. Remove Nitrates and Phosphates from the source water by using RO/DI water.
2. Do more frequent water changes. One a week is a good place to start.
[x]3.Manually remove the nuisance via pulling it out by hand, forceps or siphoning.
4. Cut back on lighting, totally blackout the tank for a week or at a bare minimum, cut the lighting time in half.
[x]5. Increase your clean up crew. More snails and crabs are normally a good idea.
[x]6. Reduce the amount and frequency of feedings. Every two or three days will not hurt the fish.
[x]7. Rinse the frozen foods (thaw, pour out water, put in tank)
8. Add a refugium, or if you can't, then consider using fresh macro in the tank.
[x]9. Quit using additives such as coral growers and filter feeding foods. Even though the bottles may say they dont add phosphates and such, they do impair water quality.
[x]10. Get a protein skimmer.
I missed 3... I do about once every two weeks, I dont think I can do the blackout since I now have bta, and I only have a sump... no lighting so I cant really have a refugium..
It started when I put a bunch of LR I bought... It had a tiny dot of cyano, then it spreaded so fast when I siphon the sanbed out at night, It looks the same the next night