Hot Tub Water Care
Plain-English, source-cited guides to keeping spa water clean and balanced.
Guides
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Hot tub water balance cheat sheet
Ideal levels for chlorine, bromine, pH, alkalinity, and hardness — and the order to adjust them.
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How much chlorine (or bromine) to add
The per-gallon dosing math, after-soak top-ups, and weekly shock, with a worked example.
Soak: Hot Tub Assistant
Enter a test reading and your tub volume; Soak gives the exact dose for your products, in the right order, with plain-English guardrails. Pay once, no subscription, no ads, fully offline.