Observed arrival · 2026-10-06
Pooldex’s pool-and-hot-tub dosing calculator
A free calculator turns water-test readings and the chemicals on hand into a step-by-step dose plan for pools and hot tubs.
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Pool and hot-tub owners testing their water
- Worth noticing
- It splits large corrections into steps, including limiting acid adjustments to no more than 0.4 pH at a time.
Field notes
The calculator asks for four readings—free chlorine, pH, total alkalinity, and stabilizer—and lets users specify the strength of the chemicals they have. Its sample plan sequences chlorine, baking soda, and acid, with wait and retest instructions; larger corrections are split into steps. The site says the calculations happen in the browser, labels its results estimates rather than guarantees, and directs users to follow product labels.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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