FREE LOG + GUIDE · AQUATICS
A better daily log, and the truth about ORP
A printable daily residual log that puts test-kit, online and ORP readings side by side, plus a 2-page guide to what ORP can and can’t tell you about the chlorine in your pool.
What's inside
- ✓Daily log — free / combined / total chlorine, pH, online reading, ORP, temperature, bather load, chemicals and backwash, with blank fields for your required ranges
- ✓How ORP and amperometry work — in plain language
- ✓Why ORP drifts — 29.58 mV per decade, >±30% error from ±5 mV
- ✓Three pool conditions — stabilizer (CYA), the sunset effect, bather organics
- ✓Questions to answer before you change control strategy
Free download
Get the log and guide
Printable PDF. Your local limits, not ours.
- Adapted from Halogen’s ORP Versus Amperometry white paper (M. Silveri, 2026)
- ORP kept as a qualitative indicator, not a chlorine number
- No regulatory limits printed: you fill in your local code
Who it's for
Operators who fill in logs every day and want them to show disagreements between test-kit and online readings, and facility managers weighing ORP vs amperometric control.
Thinking about amperometric control? Send your CYA range, sanitizer and water temperature for an application review.
Ask about your pool