Tools
Pool chemistry tools
Calculators that show their math, each with a plain page on the formula, worked examples, and the published sources behind it.
Being rebuilt
LSI Calculator
Is your water eating your plaster or scaling your heater? One number tells you.
Open Being rebuiltDosing Calculator
How much to add, worked out from your pool volume and your test results.
OpenBoth calculators are being rebuilt for the new site with published worked examples and automatic tests that run before every update, so a wrong number can never go live.
A third tool, a calculator for the 7.5% Rule from Episode 2, is planned if John approves it.