Contact
A real person reads these. Corrections to the math are especially welcome — this site's whole promise is that the numbers are right.
Email us
Pick whichever fits — they all reach the same inbox, but the labels help us triage.
- General questions & feedback [email protected]
- Corrections to our math or advice [email protected]
- Partnerships, affiliates, press [email protected]
- Privacy & data requests [email protected]
Replies within 2–3 business days. If you're writing about your own pool, include its volume and your test readings — it saves a round trip.