API Freshwater Master Test Kit API Freshwater Master Test Kit is a complete liquid aquarium test kit for freshwater aquariums, measuring pH, high range pH, ammonia, nitrite, and nitrate to help monitor the most important invisible water problems. API Freshwater Master Test Kit for Complete Freshwater Water Testing Most freshwater water-quality problems are invisible until fish are already stressed. This master kit brings the core freshwater tests together in one reusable kit, making it easier to monitor cycling, pH stability, ammonia spikes, nitrite problems, and nitrate buildup during routine aquarium care. Freshwater Master Testing for pH Ammonia Nitrite and Nitrate Measures pH, high range pH, ammonia, nitrite, and nitrate. Designed for freshwater aquariums and tap-water checks. Useful for aquarium cycling, weekly maintenance, troubleshooting, and new fish additions. Helps detect ammonia and nitrite before they cause visible fish health problems. Helps monitor nitrate buildup from fish waste and organic matter. Includes liquid test reagents, test tubes, colour cards, and instructions for repeated testing. J&L listing notes the kit performs over 800 tests. API Freshwater Master Test Kit Use and Maintenance Notes Product type: liquid freshwater master test kit Parameters tested: pH, high range pH, ammonia, nitrite, and nitrate Use for: freshwater aquariums New aquariums: test frequently during cycling Established aquariums: test weekly or when fish appear stressed Rinse test tubes immediately after use to reduce staining and residue. Do not pour used test solution back into the aquarium. API Freshwater Master Test Kit Directions Select the test needed and read the specific instructions before dosing reagents. Rinse the test tube and fill it with aquarium water to the marked line. Add the correct test solution drops in the exact order listed for that test. Cap and shake or invert the tube as directed by the instruction booklet. Wait the required development time before reading the colour. Compare the sample to the correct freshwater colour card in good lighting. Rinse test tubes after use and store reagents capped and upright. What's Included Seven liquid test solution bottles Four glass test tubes with caps Holding tray Computer-calibrated laminated colour cards Step-by-step instruction booklet