How the Base Demand Helper Works
This tool converts a base-demand drop test into an estimated dose of soda ash or another base product specified by your test kit. Enter the number of drops used, your pool volume, and the conversion factor printed in the kit instructions. The calculator scales the result to your actual pool size and displays it in ounces, pounds, grams, or kilograms.
Different test kits may use different reagents and conversion factors, so use the factor supplied with your own kit. Do not assume the same factor applies to every base-demand test.
Why Base Demand Testing Matters
A base-demand test estimates how much product may be needed to raise pH. Two pools with the same low pH can require different doses because total alkalinity and other buffering compounds affect how strongly the water resists change.
Soda ash raises both pH and total alkalinity. That can be useful when both are low, but it may not be the best choice when alkalinity is already high. In some pools, aeration can raise pH without adding more alkalinity.
Common Base-Demand Mistakes
- Using a factor from a different test kit.
- Confusing soda ash with baking soda.
- Ignoring the effect on total alkalinity.
- Adding the entire dose without circulating and retesting.
- Using an inaccurate pool volume.
Before reaching for soda ash, check total alkalinity. If alkalinity is already high, aeration may raise pH without creating another problem.