NSF/ANSI Standard 50 and the MAHC
Commercial Pool Chemicals must be NSF Certified or EPA Registered
"New: Specifies that numerous pool chemicals (stabilizers, pool-grade salt, clarifiers, flocculants,...
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NSF pool chemicals
What Does NSF Certification Mean?
The organization referred to in this article is NSF International, formerly the National Sanitation Foundation. It is separate from the National Science Foundation. Founded in 1944, it exists to provide third-party testing and validation of products available to the public. Directly from their website: