The SpaPure Defoamer is a spa cleaner that uses a concentrated formula that targets and eliminates foam created by the contaminants left behind by residual soaps, cosmetics, and other materials that were brought into the spa. This product will not clog filters and is compatible with chlorine, bromine, biguanide, and mineral sanitizers. Long lasting formula Effectively and quickly eliminates foam Compatible with chlorine, bromine, biguanide, and mineral sanitizers