- Sku:
- Vendor: Spa Star
Spa Star pH Up
Raise low pH quickly and restore comfortable, balanced water with Spa Star pH Up. This fast-dissolving granular formula increases hot tub water pH to help prevent corrosion, protect spa equipment, and improve overall water comfort.
Key Features & Benefits
- Raises pH quickly – Helps correct low pH for balanced, comfortable spa water
- Protects spa equipment – Reduces the risk of corrosion to heaters, pumps, and metal components
- Improves water comfort – Helps prevent irritation caused by acidic (low pH) water
- Fast-dissolving granular formula – Easy to apply with quick results
- Compatible with all sanitizer systems – Works with chlorine, bromine, ozone, and mineral systems
Active Ingredient
- Sodium Carbonate
Hot Tub Instructions for Use
- Test spa water to determine current pH level.
- The recommended pH range for spas is 7.2–7.6.
- With the circulation system running, add 1 tablespoon per 200 gallons of spa water to raise pH slightly.
- Distribute product evenly across the water surface (do not pour in one spot).
- Allow water to circulate for at least 30 minutes.
- Retest water and repeat as needed until the desired pH range is reached.
Tip: Adjust in small amounts and retest between doses to avoid overshooting. If total alkalinity is also low, raise alkalinity first for the most stable pH.
Specifications
- Product Type: pH Increaser
- Form: Granular
Spa Star pH Up is an essential water-balance product for maintaining a safe, comfortable, and well-protected hot tub system.
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Spa Star pH Up

