Easily check copper in drinking and tap water by color comparison. 0.1–3.0 mg/L range, results in about 5 minutes, approximately 90 tests....
Easily measure free chlorine in drinking and tap water. Check chlorination and filtration by color comparison. 0.1–5 mg/L, approximately 60 tests....
Easily monitor chloride-based salinity in aquarium, well and process water. Track salt additions, water changes and mineral levels....