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If a result looks wrong, please tell us which calculator you used, the numbers you entered and the result you expected. If you have a product label or test result that disagrees, include it. We review every report.
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Missing a calculation you need, like a specific product or pool type? Let us know. Many of our calculators started as reader requests.
What we can't help with
We can't diagnose your pool remotely or give professional service advice. For equipment problems, leaks or persistent water issues, contact a local pool professional. For anything related to health, contact your doctor or local health department.