Test Strip
A test strip is a plastic strip with reagent-impregnated pads that produce colour changes when dipped in pool water, indicating chemical concentrations.
Definition
A test strip is a plastic strip with reagent-impregnated pads that produce colour changes when dipped in pool water, indicating chemical concentrations.
Typical Values: Accuracy: ±10–20% in ideal conditions; worse in high humidity or with old strips
In Plain Language
Test strips are convenient for quick daily checks but less accurate than liquid DPD kits. They are affected by storage conditions, dip time, reading delay, and light conditions during colour comparison. For parameters where precision matters (CYA, combined chlorine), liquid kits should be used. Test strips are most useful for rapid daily FC and pH screening, with liquid kit verification monthly.
Why It Matters
Test strips are the most widely used consumer testing method. Understanding their limitations helps users know when to cross-check with a liquid kit.
Typical Values
Accuracy: ±10–20% in ideal conditions; worse in high humidity or with old strips
Last reviewed: 2026-06-01