Robelle pool calcium hardness increaser, 25-lb
Calcium chloride-based pool hardener that raises calcium hardness to help prevent corrosion. Easy to dissolve and use, balancing pool chemistry as reported by customers
Highlights
- Raises calcium hardness
- Prevents corrosion
- Easy dissolution
Pros
- Dissolves easily
- Straightforward to use
- Raises calcium hardness to reduce corrosion/etching
Cons
- Contains calcium chloride as active ingredient
- Limited to calcium hardness range guidance
Best For
Features
- Calcium chloride for pools to adjust hardness
- Rapidly increases total hardness to protect surfaces
- Maintains calcium hardness range of 200–400 ppm
- 8 ounces raise hardness by 10 ppm per 5,000 gallons
