Pool Chemical Log Sheet

A log entry that says added chlorine is worthless three months later. A log entry that records the readings before dosing, the product, the amount, and what the equipment pad looked like is the difference between a shrug and an answer when a customer asks why the water was cloudy or a manufacturer asks about maintenance before honoring a warranty. This sheet captures the same fields in the same order at every visit so the trend across a season is visible at a glance. Keep one sheet per pool, fill in the top row with the targets you set for that specific pool at takeover, and write every visit as its own line.

The typical target row is a starting point, not a rule. Cyanuric acid, bather load, and sun exposure all change what free chlorine a pool actually needs, which is why our article on why free chlorine keeps dropping between weekly pool service visits is worth reading before you set the numbers. The Pool Chlorine Dose and Cost Calculator in our Tools section turns the gap between a reading and the target into a dose and a cost for that pool volume. If you outgrow paper, the guide on this site explains what to look for in software that logs faster than a clipboard.