Pool, Spa & Water Treatment Chemistry worked example

Shock Treatment Dose with pool volume basis of 1 10k gal: a worked example

Suppose pool volume basis falls to 1 10k gal. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate shock treatment dose from water volume, desired oxidizer rise, product strength, and efficiency.

The inputs for this scenario

  • Pool volume basis (gallons / 10,000): 1 10k gal (the input this scenario stresses; the baseline uses 2)
  • Target free chlorine rise: 10 ppm (held at the documented default)
  • Product oxidizer yield factor: 0.14 units / ppm / 10k gal (held at the documented default)
  • Delivery efficiency correction: 1.18 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Shock dose = pool volume basis x desired oxidizer increase x product dose factor x efficiency correction.
  • Shock treatment dose works out to 1.69 lb or gal at these inputs, and this is the headline figure for the scenario.
  • Base product works out to 1.43 value at these inputs.
  • Multiplier works out to 1.18 x at these inputs.
  • Factor A x B works out to 10 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where pool volume basis sits at 2 10k gal and the headline result is 3.37 lb or gal, this scenario comes in 50% below the baseline at 1.69 lb or gal.
  • It calculates the pounds or gallons of shock to add by multiplying pool volume (in 10k-gal units), the target ppm rise, the product yield factor, and an efficiency correction. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Shock treatment dose: 1.69 lb or gal (headline result)
  • Base product: 1.43 value
  • Multiplier: 1.18 x
  • Factor A x B: 10 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Shock Treatment Dose calculator, set pool volume basis to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.