Cost per test

This page focuses on the typical cost per test when using the PoolWaterLAB® photometer, based on reagent consumption for different pool and spa water parameters.

The table below lists each measured parameter together with its measurement range, typical accuracy, reagent type, and estimated reagent cost per test.

For information about measurement principles and accuracy, see Accuracy & Technology. For explanations of what each parameter represents, see Measured Parameters.

Parameter Range ppm (mg/l) Accuracy L1 Cost Per Test Reagent
Free Chlorine 0.00 – 6.00 ±10% $0.26 Tablet/Liquid
pH 6.50 – 8.40 ±0.10 $0.26 Tablet/Liquid
Alkalinity 0 – 200 ±10% $0.28 Tablet/Liquid
Calcium Hardness 0 – 500 ±10% $0.68 Liquid
Cyanuric Acid 0 – 100 ±10% $0.32 Tablet
Total Chlorine 0.00 – 6.00 ±10% $0.26 Tablet/Liquid
Phosphate (LR) 0.00 – 4.00 ±10% $0.60 Powder
Iron (LR) 0.00 – 1.00 ±10% $0.51 Tablet
Copper 0.00 – 5.00 ±10% $0.70 Tablet
Nitrate 0 – 50 ±10% $2.40 Powder
Urea 0.10 – 2.50 ±10% $2.55 Liquid
Active Oxygen 0.00 – 20.0 ±10% $0.28 Tablet
Aluminum 0.00 – 0.30 ±10% $0.80 Tablet
Ammonia 0.00 – 1.20 ±10% $0.80 Powder
Bromine 0.00 – 13.0 ±10% $0.26 Tablet/Liquid
Chloramines 0.00 – 6.00 ±10% $0.93 Tablet
Chlorine (HR) 5 – 200 ±10% $0.40 Powder
Chlorine Dioxide 0.00 – 11.0 ±10% $0.26 Tablet
Hydrogen Peroxide (LR) 0.00 – 2.40 ±10% $0.40 Tablet
Hydrogen Peroxide (HR) 0 – 180 ±10% $0.40 Tablet
Nitrite (LR) 0.00 – 1.50 ±10% $0.50 Powder
Ozone 0.00 – 4.00 ±10% $0.52 Tablet/Liquid
PHMB 5 – 60 ±10% $0.40 Tablet
Phosphate (HR) 0 – 80 ±10% $0.80 Powder
Potassium 0.70 – 12.0 ±10% $0.80 Tablet
Sulfate 5 – 100 ±10% $0.52 Powder
Total Hardness 0 – 500 ±10% $0.70 Liquid
Zinc 0.00 – 1.00 ±10% $1.30 Tablet