Pool turned green, cloudy, or off-color? Get an instant diagnosis from a photo and your water readings, with a clear step-by-step fix. Then learn to keep it clear for good with free, plain-English pool-care lessons. No jargon, no guesswork.
Snap a photo, add whatever test readings you have, and get a specific assessment of what's wrong and exactly how to fix it — free, no account needed. We'll email you the full step-by-step plan.
Something looks wrong with your water? Upload a photo and any test readings you have — pH, chlorine, alkalinity, and more — and get an instant, specific diagnosis with a step-by-step fix emailed straight to you. Free, no account.
Diagnose now →New to pool ownership, or just want to stop guessing? A free, self-paced course covering pH, chlorine, alkalinity, calcium hardness, troubleshooting, and weekly care — in plain English, with a short quiz after each section.
Open Pool School →Want to master pool care at a professional level — or earn the Certified Pool Operator (CPO®) credential? Free, exam-style practice tests and flashcards built on the PHTA Handbook and CDC Model Aquatic Health Code.
Start CPO prep →Owning a pool shouldn't require a chemistry degree. Most pool problems — green water, cloudiness, that stubborn algae that keeps coming back — come down to a handful of fixable causes. The trouble is knowing which one you're looking at, and what to do about it before it gets worse.
My Crystal Clear Pool is built to give you a straight answer fast when something's wrong, and to teach you the simple routine that keeps it from happening again. Everything here is free, grounded in professional pool-operator standards and the CDC's Model Aquatic Health Code — just translated into plain English for the person who actually owns the pool.