I just got over a Cyano outbreak. I did not want to use any chemicals, so I did %20 water changes twice in a week, and dropped the feeding by half. Man, those fish are HUNGRY, but I'm slowly increasing feeding now that the Cyano is pretty well gone. I aslo used a Turkey Baster to blast the stuff out of low flow areas. Took about a week and a half to get rid of it.
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