Sparkling clean water-naturally! Body oils, cosmetics, and grime can accumulate in the spa to cloud water, clog filters and produce scum at the water line. Spa Perfect gently biodegrades impurities for crystal clear water. Eliminates frequent scrubbing, prevents chemical odors and lengthens life of filters in heavily used spas. Easy to follow once-a-week regimen. (Similar to "Scumdigester".)