Rez Moss

Rez Moss

Digital Reflections: Exploring Tech, Innovation & Ideas

Pool Water Planner

Jul 2026

Enter your latest test-kit readings and this planner builds a staged treatment plan for chlorine, pH, alkalinity and stabilizer, sized to your pool volume. Optional total-chlorine and calcium-hardness readings make the review more complete. It runs in your browser: nothing is uploaded, and your saved readings stay in local storage on this device.

My Pool Water Planner

Treatment steps for your pool, in order. Retest before the next major correction.

95,000 litres25,000 US gallons

Today's test

Use a drop-based (DPD) kit if possible. Test in the shade with the pump running. Blank optional fields mean “not tested.”
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pH
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Pool size & product settings
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About doses: Liquid-chlorine math uses the label strength. Alkalinity and stabilizer estimates assume 100% sodium bicarbonate and 100% cyanuric acid. If your label differs, use its dose instead.
Recent saved readings

Your plan

2–4 ppmFree chlorine
7.2–7.6pH (7.8 max)
80–120Alkalinity
30–50CYA, outdoors
In rangeCautionOut of range
Ready
Enter results and build the plan.
Safety: Never mix chemicals or add water to chemical. Use separate clean tools, add one product at a time, and keep children and pets away. The product label—not this planner—controls protective equipment, application, dosage limits and swimming wait time.

How It Works

  1. Enter today’s test: free chlorine (FC), pH, total alkalinity (TA) and stabilizer (CYA). Add total chlorine and calcium hardness if your kit measures them.
  2. Set pool size and products: your pool capacity, liquid chlorine strength, chlorine target, whether you use stabilized pucks, and your alkalinity target.
  3. Build the plan: the planner handles the immediate health controls—pH and sanitizer—first, then slower balance corrections. It splits large corrections into stages and asks you to retest before conditional steps.
  4. Save and print: keep a local history of readings and print the plan for the shed.

Safety

This is a planning aid, not a substitute for the product label. Never mix chemicals. Add one product at a time with the pump running, keep swimmers out during treatment, and follow the product label for application method, protective equipment, and swimming wait times.

What the numbers mean

The displayed operating ranges follow Canadian public-health guidance for residential pools: FC 2–4 ppm, pH 7.2–7.6 (7.8 maximum), TA 80–120 ppm, and CYA 30–50 ppm in outdoor pools. Health Canada recommends testing sanitizer, pH, alkalinity and calcium hardness daily, especially during high use. The CDC also identifies chlorine and pH as the first defence against waterborne germs and recommends at least 2 ppm FC when CYA or stabilized chlorine is used.

Liquid-chlorine doses are nominal calculations from the strength printed on the container. Alkalinity estimates assume 100% sodium bicarbonate; stabilizer estimates assume 100% cyanuric acid. Product formulations and label directions vary, so always use the label when it differs. A pH-adjuster dose is deliberately not guessed: pH alone does not reveal acid or base demand.

Sources: Health Canada pool and spa chemical guidance, HealthLink BC residential pool water-quality ranges, and CDC home pool testing guidance.