It's well known.
https://www.lgsonic.com/?utm_source=google&utm_medium=cpc&utm_campaign=sonicsolutions&gclid=EAIaIQobChMIoMa--Lu2-wIVzdrVCh3RpQF2EAAYASAAEgJUofD_BwE
Problem is that it addresses the symptom (algae) though not the cause (excess phosphorous).
Environmental Rejuvenation 2, page-18
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