Pool Chemistry and Maintenance From a Backyard Pool Owner
Nadia Caldwell · September 2, 2026
I’ve been looking after pools and spas around Arizona and New Mexico for nearly a decade, and I can tell you that the single most frequent mistake I see with cold plunge tubs has nothing to do with temperature control—it’s sanitizer choice. Pool owners spend hours reading about bromine vs chlorine for hot tubs, find … Read more
Nadia Caldwell · July 15, 2026
Not long ago, a friend of a friend with a backyard pool asked me whether her salt cell was defective. She’d replaced it three times in two years. “Nadia,” she said, “is this thing broken, or am I doing something wrong?” We went through her maintenance routine, tested her water, and—surprise—the cell wasn’t actually dead. … Read more
Nadia Caldwell · July 8, 2026
Over years of chasing water chemistry in Arizona 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?” The problem is staggering. Spa retailers champion bromine. Your neighbor touts chlorine results. Someone on a forum insists bromine reeks of laboratory chemicals, … 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