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Natural Chemistry Spa Stain & Scale protects your spa from the damaging effects of scale build-up and staining due to excessive calcium, iron, copper, and other minerals. Spa Stain & Scale works without the use of phosphates or harsh acids. This product also works well at preventing scale from forming on salt generator cells, to help maintain optimum performance. Best of all, it can be used with any sanitizing system and is compatible with all spa surfaces.
8 fl oz per 200 gallons of water.
1 fl oz per 200 gallons of water per week.
Initial Treatment of Fresh Fill:
Add 8 oz (237 ml) per 200 gallons (757 L) directly to spa water.
Add 1 oz (30 ml) per 200 gallons (757 L) directly to spa water.
If water hardness level is above 500ppm, double the recommended dose.