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The numbers a tech needs poolside — no login, fast on a phone. Outputs are indicative; read the note under each tool.
Litres from shape and dimensions — the number every dose starts from.
Freeform pools use a 0.89 shape factor. Round up when dosing sanitiser down.
Salt to add to reach chlorinator operating range.
Check the chlorinator's rated range — targets vary by model. 1 ppm = 1 mg/L.
Is the water balanced, corrosive or scale-forming?
Carbonate alkalinity = TA − CYA/3. Balanced band ±0.3.
Indicative heater output to lift and hold pool temperature.
1.16 Wh per litre per °C, plus 25% for surface losses. Indicative only — covers, wind and location move this a lot.
Annual running-cost difference when swapping the pump.
Assumes the same run hours year-round. Variable-speed pumps often allow longer, slower runs — savings shown are conservative.
Need product to act on a result? Salt, balancers and sanitiser are on the next run — call your rep.
