By helping to keep the salt cell free of scale deposits and residues, AquaPill Salt Cell Guard helps to keep the salt generator operating at peak performance. A clean salt cell makes it less likely that chlorine output will fall off and more likely that proper chlorine levels will be maintained. Consistently maintaining the proper chlorine level makes for better water quality, more enjoyable swimming and less need to shock treat the pool. For best results use this product every month. This product is safe to use with all types of salt chlorine generators and in all types of pools. It will not affect the overall water chemistry. Use One AquaPill for every 20,000 gallons of water.