Raises low calcium levels quickly. Fast-dissolving calcium chloride helps restore balanced pool water in just 15 minutes.
How to use
Add this product directly to the water with the circulation system running and brush any settled product.
Do not add this product on the same day as another product used to increase pH or alkalinity.
Add 1.2 lbs per 10,000 gallons of water to increase calcium hardness by 10 ppm (1 lb = 2.75 cups).
Wait two hours and retest calcium hardness.
Do not dissolve this product before use or mix it with
other products in the same bottle or pail. See label for detailed instructions.
Frequently Asked Questions
Q: What does a calcium hardness increaser do?
A: It raises low calcium levels in your pool water to prevent corrosion and protect surfaces like plaster, vinyl, and tile.
Q: What’s the ideal calcium level for pools?
A: Between 200–400 ppm is ideal for most pools. Use a water test kit to check your current level before adding.
Q: Is it safe for saltwater pools?
A: Yes, it’s compatible with both saltwater and chlorine systems.
Q: How quickly does it work?
A: You can typically resume swimming just 15 minutes after application with the pump running.
Q: Will it damage my pool finish?
A: No—it helps protect your pool finish by preventing water from becoming too aggressive due to low calcium.
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