Pool Chemistry and Maintenance From a CPO
Nadia Caldwell · July 15, 2026
Last month, I got a call from a resort manager in Scottsdale who’d just replaced a hot tub salt cell for the third time in two years. “Nadia,” she said, “is this thing defective, or am I doing something wrong?” We pulled up her maintenance logs, tested her water, and—surprise—the cell wasn’t actually dead. It … Read more
Nadia Caldwell · July 8, 2026
Throughout my years overseeing water chemistry at Arizona’s premier resorts and homeowner communities, one question surfaces consistently from hot tub owners entering the spa world: “bromine vs chlorine hot tub—which one should I use?” What I use on my pool: The tablets that kept my spa clear without daily chemical adjustments — Clorox® Pool&Spa™ Spa … Read more
Nadia Caldwell · July 8, 2026
You lift the cover on a Wednesday afternoon and stop. The water’s gone milky. Not quite green, but heading that direction fast. Your skin itches after a soak yesterday. And that smell—sharp, almost medicinal—hits you the moment the lid comes up. You assume the chlorine is doing its job. It’s not. What you’re looking at … Read more
Nadia Caldwell · July 2, 2026
A free chlorine reading of 3 ppm at 102°F in a hot tub sounds acceptable until you test the combined chlorine — and watch it spike to 1.5 ppm or higher. That gap between the two numbers is telling you something critical: your sanitizer is degrading faster than your water chemistry can handle it, and … Read more