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Tl; dr- Cyano runs on a circadian (cyclical) clock for photosynthesis and nitrogen fixing. Scientists have successfully disrupted this cycle and have successfully proven that this will kill it... Perhaps changing the on/ off times drastically could work for aquarists with cyano issues?
 

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Cyano from my experience does react fast to reduction of light hours and a lower water temperature all other things being equal.
THIS sounds like the Waldstat hours would be another method. That thing where she says give your tank a mid day siesta from light boosts faster plant growth. Only for the cyano its reverse..
 
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