Crystal Waters Hardness Increaser  is used to raise the Calcium Hardness level in your  swim spa water. This can be known as Calcium, or Total Hardness. Water low on calcium can draw it out of other metals in your swim spa, corroding the equipment, and provide an environment favourable to algal growth. 

Dosage: To raise Calcium Hardness by 10ppm, add 10g per 1,000L. 
Recommended Calcium level: 80ppm-140ppm 
Active constituent: Calcium Chloride 
Available sizes: 500g (Calcium Enhancer), 4kg

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