Support answer · Calcium
What should I do before adding calcium hardness increaser, and how often should I test?
Short answer: Confirm calcium is low and pH and alkalinity are balanced before adding increaser, and test regularly, especially after fresh water or chemical changes.
Based on Maytronics support, updated 2026-08-11, rewritten by Poolbots' pool experts.
The answer
What to know.
Before adding calcium hardness increaser
- Step 1: Check your water chemistry. Start by testing the pool water.
- Step 2: Verify that calcium hardness is low. Make sure the results show that an increaser is needed.
- Step 3: Check pH and alkalinity. Both should be balanced before you add the increaser.
- Step 4: Follow the product directions. Carefully follow the dosage instructions for your calcium hardness increaser.
How often to test
Check calcium hardness regularly as part of routine pool care, especially after adding fresh water or adjusting pool chemicals.
To maintain calcium hardness over time, continue testing and keeping your water chemistry balanced. Use calcium hardness increaser only when needed, and stick to the recommended maintenance schedule.
Source: Maytronics support. Same steps and facts, rewritten for clarity; the videos and illustrations are Maytronics' own.
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