SpaPure Filter Cleaner is a heavy-duty filter cleaner that removes body oils, soapy residues, scale, and grime from filter cartridges. Helps maintain healthy and clear spa water while improving filtration and circulation. While the filter cleaner bottle holds 2 applications, the packet contains 1 application. This product is compatible with chlorine, bromine, biguanide, silver/mineral, and ozone-treated pools and spas.