GLB Pool Filter Cleanse - 2 lb

Special solution changes color from red to yellow when filter is clean.

Multi-purpose, granular formulation cleans any type of filter (sand, cartridge or D.E. filters).

Compatible with chlorine, bromine, mineral purification systems, salt water pools, ozone and biguanide sanitizers.

Dosage Rate: 1 lb. per 5 gallons.