Natural Chemistry(R) 14131NCM Spa Perfect(TM); 1 L Bottle
Spa Perfect's SMARTZyme™ technology reduces unwanted non-living organic contaminants such as: body oils, cosmetics, suntan lotions, hair products and so much more! No more waterline rings, cloudy water or unpleasant odors. Spa Perfect also works as a continuous cartridge filter cleaner.
I started using this in hopes that it would remove or prevent the water line ring around the inside of my hot tub and it does just that. It also reduces chemical smells.