With my Marineland LED the Cyano has not gone away just like your DIY fixture. Could be another reason to buy AI Sol LEDs if your Cyano has completely disappeared? That would be a great problem to not have to worry about cyano in the future. Sorry I forgot you had a DIY fixtue on the sea horse tank but I could not tell much difference? But I do have to admit I am a man and we do not look closely to details (according to my wife)