Free chlorine vs. combined chlorine: Why you might not know how clean (or dirty) your pool is
Ah, good old chlorine. When it comes to swimming pool sanitation, it’s the go-to, tried-and-true method. How hard can it be to chlorinate your pool water, after all? But you don’t need to be a chemist to know this is a potentially dangerous way to think about sanitizing your pool. When testing the water [...]