Pool, Spa & Water Treatment Chemistry worked example

Chlorine Tablet Feed Rate with pool volume basis of 5 10k gal: a worked example

What does the result look like when pool volume basis reaches 5 10k gal? The full calculation is worked below with real intermediate numbers. Use it to plan trichlor feeder settings, route inventory, or expected tablet consumption.

The inputs for this scenario

  • Pool volume basis: 5 10k gal (raised for this scenario; the documented default is 2)
  • Daily free-chlorine demand: 2 ppm / day (unchanged)
  • Tablet demand factor: 0.56 tablets per ppm per 10k gal (unchanged)
  • Feeder efficiency adjustment: 1.18 x (unchanged)

Working through the calculation

  • Applying the documented formula (Tablet feed rate = pool volume basis x daily demand x tablet demand factor x feeder efficiency adjustment) to the inputs above produces each figure below.
  • At this operating point the engine returns 6.61 tablets / day for estimated tablet feed rate, the number this scenario is built around.
  • At this operating point the engine returns 5.6 value for base product.
  • At this operating point the engine returns 1.18 x for multiplier.
  • At this operating point the engine returns 10 value for factor a x b.

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 2.64 tablets / day, this scenario comes in 150% above the baseline at 6.61 tablets / day.
  • A figure at this level is achievable when pool volume basis is genuinely sustained, not just peaked for a shift. Trichlor tablets add cyanuric acid with every dose, so a feed rate correct for chlorine today will slowly over-stabilize the pool and eventually require a partial drain.

Results at a glance

  • Estimated tablet feed rate: 6.61 tablets / day (headline result)
  • Base product: 5.6 value
  • Multiplier: 1.18 x
  • Factor A x B: 10 value

Run it with your numbers

  • Every input above is editable in the live Chlorine Tablet Feed Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.