- Also known as Calcium chloride.
- Calcium Hardness should be between 200-300ppm and should be checked monthly.
- If levels fall below the recommended level then the water can start to erode heaters, ladders handrails etc.
- Dosage: to increase by 10ppm add 2g per m3 of water (you may get temporary clouding of the water)
- Use to raise Calcium Hardness if under 200ppm