192
people found this helpful, as of 2023
ranked #172,290 most helpful
out of 571,544,897 reviews
★★★★★
Worked as described.
Very easy to use.
the product in question
Water Total Hardness Test Strips 100ct | 99% Accuracy Hard Water Testing Kit with 0–25 GPG Optimized Range | Calcium & Magnesium Tester for Water Softener, Aquarium, Pool, Spa, Drinking & Well Water
4.2★ · 625 ratings, as of 2023