NSF Product and Service Listings

These NSF Official Listings are current as of Thursday, January 15, 2026 at 12:15 a.m. Eastern Time. Please contact NSF to confirm the status of any Listing, report errors, or make suggestions.

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NSF/ANSI 50
Equipment for Swimming Pools, Spas, Hot Tubs
and Other Recreational Water Facilities



 
Earth Science Laboratories, Inc. 
903 North 47th Street
Suite 105 
Rogers, AR 72756 
United States 
800-257-9283 
479-271-7381
Visit this company's website

Facility : Holdrege, NE

Chemicals
Trade Designation Function Max Use

Miscellaneous Treatment Chemical
Algae Shield®[1] [2] [3] Algicide 19 mg/L
AlgaeShield®[1] [2] [3] Algicide 19 mg/L
MetalShield[1] [2] [4] Scale Inhibitor 50 mg/L

[1] Certified for health effects only.
[2] This product is not certified for performance claims.
[3] Certified for use at a maximum dose of 2 ft. oz/ 1,000 gallons in pool or spa water.
[4] Certified for use at a maximum dose of 32 ft. oz/ 10,000 gallons in pool or spa water.


NOTE: Only products bearing the NSF Mark on the product, product packaging, and/or
      documentation shipped with the product are Certified.

Number of matching Manufacturers is 1
Number of matching Products is 3
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