SpaGuard Spa Calcium Hardness Increaser (12 oz) (12)
Amazon Price as of 02/24/2025 21:30 GMT+00:00
$95.88
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average price $92.47
$3.41 higher than average
$75.10
$91.69
Product Description
SpaGuard's Calcium Hardness Increaser enables spa owners to increase their calcium hardness with this easy to use granular formula, which will boost your calcium hardness to above the danger zone, where low levels cause extensive corrosion of plumbing, jets, fixtures, and tub surfaces. Calcium Hardness Increaser helps raise the calcium level steadily so you don't get too much calcium and start developing scale build-up and cloudy water. The optimal calcium hardness level is 200-400 ppm, while anything below 100 ppm will cause corrosion.
• Prevents corrosion of equipment
• Prevents degradation of spa surfaces
• 1 tbsp. per 100 gallons increases calcium hardness ~25 ppm
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