Hydroponics 4-Way Test Kit, Maintain proper nutrient balances and achieve optimum growing conditions in soil-less systems. Test for pH and three key nutrient factors, Applications: Soil, Environmental Education, Model HP-1, approximately 50 tests each.
Chloride Test Kit for Chloride in fresh water samples using the Direct Reading Titrator method, Water Type: Fresh, Range/Sensitivity: 0-200ppm Cl in 4ppm increments, No of test: 50, No of reagents: 4, Applications: E