Pool and hot tub guides
Plain-language guides that explain what the numbers mean, the order to fix them in, and how to handle pool chemicals safely.
GuideFree chlorine and CYAWhy higher stabilizer means you need more chlorine.GuideHot tub water careCDC levels, chlorine versus bromine, and a weekly routine.GuideHow to test pool waterWhich tests to trust and how to take a good sample.GuidePool chemical safetyStorage, never-mix rules, gear and spills.GuideWhat to adjust firstThe sequence that stops one fix from undoing another.