It's not uncommon for hobbyists to report cyano problems after using AF. Most likely is due to algae die-off from using AF. Removing dead algae, siphoning, water changes, running GAC will all help to remove excess waste products produced fro dieing algae.
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Cliff Babcock
Intestests: Digital Microscopy; Marine Pest Control; Marine Plants & Macroalgae
Current Tank Info: 180 g. mixed reef system
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