Spa Calcium Hardness Increaser
HELPS PREVENT CORROSION OF YOUR SPA'S PLUMBING AND HEATER!
- Low calcium levels can cause staining on your spa's surface as well as corrosion in spa lines and equipment.
- When the calcium level of your spa water drops below 200 ppm, just add Calcium Increaser.
- Dosage: 1 oz. per 500 gallons.