Pool Chemistry and Maintenance From a CPO
Nadia Caldwell · July 11, 2026
Stand at the equipment pad on a Tuesday in mid-summer, chlorine test kit in hand, and you’ll spot the pattern immediately: the free chlorine reading has tanked again, despite dosing just yesterday. So you add another dose. You recheck the stabilizer levels. A faint green shadow appears near the steps, triggering a full shock treatment … Read more
Nadia Caldwell · July 10, 2026
Dawn breaks at 7 a.m., and your pool’s surface has become a landing pad for an entire oak tree worth of branches and leaves. You reach for that threadbare skimmer net—the one that came vacuum-sealed to your telescoping pole back when you first set up—and you start dragging it across the water. It collects maybe … Read more
Nadia Caldwell · July 10, 2026
Suppose you’re dosing shock at 20 ppm and your CYA reads 110 ppm. That’s the moment people start screaming “chlorine lock” online. They’ve dumped chemicals, nothing visibly improves, and panic sets in. The chlorine won’t budge on the test kit. They’ve absorbed the cyanuric acid chlorine lock myth wholesale, treated it as settled fact, and … Read more
Nadia Caldwell · July 9, 2026
“Solar covers don’t actually work,” a pool store manager told a customer in front of me last year. “You need a real heater.” I asked him if he’d ever tracked water temperature on a covered versus uncovered pool during the same week. He hadn’t. That’s the problem with advice born from guesswork instead of data. … Read more
Nadia Caldwell · July 9, 2026
A pH reading of 7.8 right before you shut down for winter isn’t a problem—it’s a warning. That number tells you the water’s alkalinity buffering is working, but the moment freezing temps hit and you stop circulating, you’re about to trap chemistry inside a dormant system where it can’t respond. This is the post about … 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 8, 2026
You’ll encounter two conflicting claims about pool lighting online: one camp insists LEDs drain your wallet with installation costs, while another swears they pay for themselves in three months. Neither is accurate. The truth is far simpler — LEDs cost less to operate, last exponentially longer, and eliminate the thermal hazards that made incandescent fixtures … Read more
Nadia Caldwell · July 7, 2026
Let me cut straight to it: no product manufacturer makes a DIY pool sun shelf kit that actually works the way you’re imagining. Across twelve years of handling water chemistry for everything from upscale resort properties to community HOA pools scattered throughout Arizona, Nevada, and coastal Southern California, I’ve fielded this exact question from at … Read more
Nadia Caldwell · July 7, 2026
That call came in on a Tuesday afternoon: “My pool store just quoted me $1,600 for a salt system, but my neighbor says I should get a tablet feeder instead for $200. They both say ‘automatic chlorine.’ What’s the actual difference?” What I use on my pool: The chlorine feeder that handles salt or dry … Read more