GLB Algimycin 3000 contains two active ingredients, including zinc sulfate monohydrate, to kill and provide long-lasting protection from green, yellow and black algae. It can be used on all pool surfaces, is stable in the water and compatible with chlorine, bromine, saltwater chlorine, ozone, and biguanide and mineral sanitizing systems.Contact: (800) 445-2059; www.glbpool.com
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