Support answer · Calcium
How do I know if my pool needs calcium hardness increaser, and when should I add it?
Short answer: Test your pool's calcium hardness regularly. Add calcium hardness increaser when the reading is below 200 ppm.
Based on Maytronics support, updated 2026-08-11, rewritten by Poolbots' pool experts.
The answer
What to know.
Check your pool's calcium hardness regularly with a pool water test kit.
When to add calcium hardness increaser
- When your test shows calcium hardness below 200 ppm.
- After the pool has been drained and refilled.
- As part of your regular water-balancing routine.
- If your area's water is naturally soft.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
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