1. Maintain proper daily levels:
Alkalinity: 100-150 ppm
2. If levels are higher, add 60 mL of SPA MINUS GEL per 1,000 L of spa water to decrease pH 0.4.
3. Spa must be in operation before SPA MINUS GEL.
4. Wait 15 minutes and retest pH.
5. Repeat operation until recommended levels are reached.