Last updated: 14/01/2026 12:38:45
POOL AND SPA HARDNESS 18KG
Product Code
- Product group:
- 657
- Product number:
- 766538
Maintain Optimal Calcium Levels for a Pristine Pool and Spa Pool and Spa Hardness is designed to raise the calcium hardness of pool and spa water, helping to prevent corrosion, etched plaster, and other issues caused by low calcium levels. Proper calcium hardness is essential for maintaining the integrity and comfort of your pool and spa surfaces.
Product information
Why Choose Pool and Spa Hardness?
Choosing Pool and Spa Hardness means opting for reliable performance that ensures optimal calcium hardness levels to protect your pool and spa. Its easy-to-use application process simplifies maintaining water quality. By helping to maintain the integrity and appearance of your pool and spa surfaces, it offers comprehensive protection.
Invest in Pool and Spa Hardness today to ensure your pool and spa remain in top condition. Enjoy a safe, comfortable, and pristine water environment with our high-quality solution.
Features
Versatile Use: Suitable for pools, spas, and hot tubs. Raises Calcium Hardness: Effectively increases calcium hardness levels to prevent water from becoming corrosive. Prevents Damage: Helps prevent etching, staining, and distortion of pool surfaces. 100% Active: Ensures maximum effectiveness with a fully active formulation.
Benefits
Multi-Use Product: Versatile solution for various water systems. Enhanced Surface Protection: Protects against rough, abrasive surfaces that can be uncomfortable for bathers and difficult to clean. Improved Water Quality: Reduces the risk of algae growth and makes cleaning easier by maintaining proper calcium levels.
Specification
General
| Invent Hazard Material (IMO/EU) classification | NA |
|---|
Physical properties
| Appearance | White |
|---|---|
| Density [g/ml] | 2.15 |
| Form | Granules |
| pH | 7 to 11 (10% solution) |
Technical data
| Solubility in water | Soluble |
|---|
Safety Data Sheet (SDS)
Documents
Directions for use
Ideal bathing conditions exist at a slightly alkaline pH level of 7.2--7.6, with alkalinity of 80/150 mg/l. This range will also allow the most effective use of other swimming pool chemicals. Determine the calcium hardness of your pool water using Poolcheck 6 in 1 Test Kit (Product no. 767020). Use Pool and Spa Hardness Increaser at the rate of 100 g per 10m3 to raise calcium hardness by 10 mg/l. Dissolve the required amount of Pool and Spa Hardness Increaser in a clean container with clean water and pour slowly around the perimeter of your pool and spa. Ensure both the pump and filter are running to circulate the product effectively. Re test and make any further additions as required.
