Support answer · Calcium
What is calcium hardness increaser and what are the ideal levels for pools and spas?
Short answer: Calcium hardness increaser raises calcium in the water, with ideal levels of 200-400 ppm for most pools and 150-250 ppm for most spas.
Based on Maytronics support, updated 2026-08-11, rewritten by Poolbots' pool experts.
The answer
What to know.
Calcium hardness increaser raises the amount of calcium in pool water. It helps balance the water and protect your pool surfaces and equipment.
Ideal calcium hardness levels
- Most pools: 200-400 ppm
- Most spas: 150-250 ppm
Keeping calcium hardness in the proper range helps:
- Prevent damage from corrosion.
- Protect the surfaces of your pool.
- Reduce scale buildup and water cloudiness.
- Keep equipment performing well.
- Keep water chemistry balanced.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
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