Phosphorus and Phosphate Detection Test Strips, 0-100 ppm [Vial of 50 Strips]

No reagents or field kits needed for tests, all you need is one strip and no chemicalsEasy to use waterproof color chart printed on every vial along with instrucionsDistinct color scale with marks at 0, 30, 75, 150, and 300 PPM Phosphate (and 0, 10, 25, 50, and 100 PPM Phosphorus)Long plastic strips ensure you can keep your fingers away from what is being testedThis strip has a detection limit of 5PPM Phosphorus, and can NOT be used to detect anything below that