SpaGuard® Natural Spa Enzyme is a biodegradable enzyme formula that breaks down the oils, lotions, and other organic residue that build up in spa water from everyday use. Left untreated, these organics contribute to scum lines at the waterline, cloudy water, and reduced sanitizer efficiency, since your sanitizer has to work through organic contaminants before it can address bacteria. This 32 fl oz (1 quart) bottle is dosed at 1 oz per 100 gallons at startup, then 1 oz per 250 gallons for weekly maintenance. Because it works on organic material rather than sanitizer chemistry, it's compatible with chlorine, bromine, ozone, and biguanide systems alike, and slots easily into an existing water-care routine. Regular use reduces the scum line that forms at the waterline, extends the time between filter cleanings, and helps your primary sanitizer focus on bacteria rather than organic buildup. It's a non-hazardous, biodegradable product that pairs well with any spa's existing sanitizer and balancer routine.