BIONIX Dissolve Oxygen Test Kit for Fresh & Saltwater. Bionix test kit can perform over 100 test and the range varies from 1 to 12 mg/l or ppm. This kit has a wide application in Aquarium, Fish farming, Aquaculture, Hydroponics, Aquaponics, Ras, Biofloc, Water treatment plant and in many other domains. This Kit comes with 3 Reagent bottle, 1 test tube, 1 Colour Card and 1 manual.