When I've battled cyano in the past, I always found it died back over night, only to come back the next day in the afternoon. I found that shutting the lights off as the bloom was just beginning each day would cause it to die back. Gradually the bloom gets later in the day, until you get no bloom with a normal photo period. I'm curious to know if this is what other people have found happens.
I'm 3 weeks into my my new tank, and I'm just starting to get diatoms. Next comes cyano. Bring it on
,I've beaten it before, and I know how easy it is to get rid of!