Yup, easy to get rid of it with Chemiclean, but unless you can maintain the right balance of bacteria to out compete the cyano, it will come back. And any carbon dosing like vodka or even bio pellets will just fuel it more. And sudden changes (new coral feedings, etc) can also upset that balance.
And it doesn't matter if your P04 and N03 are near zero. Cyano can still happen.
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