Editing Cyanobacteria (section)

=== Chemical control ===
Several chemicals can eliminate cyanobacterial blooms from smaller water-based systems such as swimming pools. They include [[calcium hypochlorite]], [[Copper(II) sulfate|copper sulphate]], Cupricide (chelated copper), and [[simazine]].<ref name="bluegreenalgae2006">{{cite web | vauthors = Main DC |title=Toxic Algae Blooms |work=Veterinary Pathologist, South Perth |publisher=agric.wa.gov.au |date=2006 |url=http://archive.agric.wa.gov.au/objtwr/imported_assets/content/lwe/water/watq/fn052_2004.pdf |access-date=18 November 2014 |archive-date=1 December 2014 |archive-url= https://web.archive.org/web/20141201235311/http://archive.agric.wa.gov.au/objtwr/imported_assets/content/lwe/water/watq/fn052_2004.pdf |url-status=dead}}</ref> The calcium hypochlorite amount needed varies depending on the cyanobacteria bloom, and treatment is needed periodically. According to the Department of Agriculture Australia, a rate of 12&nbsp;g of 70% material in 1000&nbsp;L of water is often effective to treat a bloom.<ref name="bluegreenalgae2006"/> Copper sulfate is also used commonly, but no longer recommended by the Australian Department of Agriculture, as it kills livestock, crustaceans, and fish.<ref name="bluegreenalgae2006"/> Cupricide is a chelated copper product that eliminates blooms with lower toxicity risks than copper sulfate. Dosage recommendations vary from 190&nbsp;mL to 4.8&nbsp;L per 1000&nbsp;m<sup>2</sup>.<ref name="bluegreenalgae2006"/> Ferric alum treatments at the rate of 50&nbsp;mg/L will reduce algae blooms.<ref name="bluegreenalgae2006"/><ref>{{cite journal |vauthors=May V, Baker H |year=1978 |title=Reduction of toxic algae in farm dams by ferric alum |journal=Techn. Bull. |volume=19 |pages=1–16}}</ref> Simazine, which is also a herbicide, will continue to kill blooms for several days after an application. Simazine is marketed at different strengths (25, 50, and 90%), the recommended amount needed for one cubic meter of water per product is 25% product 8&nbsp;mL; 50% product 4&nbsp;mL; or 90% product 2.2&nbsp;mL.<ref name="bluegreenalgae2006"/>