Algae Shield® and algae can't coexist. If your pool develops algae while there is Algae Shield® in the water, we'll refund your purchase price. Send a sample of your pool water and your receipt to

Earth Science Laboratories, Inc.
113 SE 22nd Street
Bentonville, AR  72712

Be sure to include your name, address, telephone number, and the name and address of the location where the product was purchased.

Guarantee void if flocculants or metal-out products were used or if high phosphate levels are present. In no case shall seller be liable for more than the cost of this product to the buyer and will in no event be liable for any consequential, special or indirect damages connected with the use or handling of this product.