Still here? Okay, here’s your cheat sheet: For one gallon of tap water at room temp, uncovered and unstirred: 24 hours. In sunlight with a fan and stirring? 2–4 hours. For a pool with stabilizer? A week or more.
So go ahead, set a timer, grab a fresh coffee, and watch that chlorine fade. It’s a slow chemical vanishing act, but you’re now the ringmaster. Just remember: Chlorine doesn’t evaporate as much as it escapes. And now you know exactly how long it takes to pull that Houdini.
Now go forth and dechlorinate. Your fish (or plants, or sanity) will thank you.
