Comments on: Testing for and Removing Phosphates Reduces Risk of Algae http://pool-water-testing.com/pool-testing-blog/2009/09/14/testing-for-and-removing-phosphates-reduces-risk-of-algae/ Pool/Spa Testing, Chemicals and Supplies Tue, 01 Jun 2010 18:08:32 -0500 hourly 1 http://wordpress.org/?v=3.0.1 By: Robert http://pool-water-testing.com/pool-testing-blog/2009/09/14/testing-for-and-removing-phosphates-reduces-risk-of-algae/comment-page-1/#comment-6 Robert Sat, 03 Oct 2009 06:03:26 +0000 http://pool-water-testing.com/pool-testing-blog/?p=38#comment-6 It is true that phosphates are the food for algae and to inhibit algae growth you need a good sanitizer. Isn't chlorine for that? Residential pool should keep their chlorine levels 1.5-3.5ppm and commercial 3.5-4.5. Outdoor pools will need cyanuric acid, 20-40 as a stabilizer. I run our local Y pool and the phosphates are near 1000, but the lack of sun and a controlled environment along with the proper chlorine level, and we never have algae. It is true that phosphates are the food for algae and to inhibit algae growth you need a good sanitizer. Isn’t chlorine for that?

Residential pool should keep their chlorine levels 1.5-3.5ppm and commercial 3.5-4.5. Outdoor pools will need cyanuric acid, 20-40 as a stabilizer.

I run our local Y pool and the phosphates are near 1000, but the lack of sun and a controlled environment along with the proper chlorine level, and we never have algae.

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