spa chemicals

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

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