Well I was feeling fairly smug about beating the hair algea problem and the reef gods punished me with a lovely cyano outbreak. I'm not entirely sure what is causing this hut clearly the must be some disolved organics (doc) fueling the cyano. First step was to examine the skimmer ( a deltec) for further clues. I recalled that I was getting less skimmate of late and on further inspection it became obvious that it was encrusted with calcium deposits and the pump was not producing enough bubbles. A good soak amd clean with some acetic acid and within 4 hours it was good as new!
The next step was to introduce some more bacteria to combat the cyano - I have opted for Dr Timms waste away & refresh. 7 days into treatment there have been no signs of improvement.
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