The API POND MASTER TEST KIT Pond Water Test Kit provides everything you need for regular testing of your pond water or even tap water. This complete pond test kit measures the most important levels, including pH, ammonia, nitrite and phosphate to maintain ideal water condition. Inside the kit youÔÇÖll find six bottles of liquid test solutions, several laminated colour-matching charts, four glass test tubes with snap-tight caps, a holding tray and an easy-to-follow instruction booklet. Simply gather your samples, add the correct test solution and compare the colour with the corresponding colour chart to determine each level. This pond kit contains enough water testing supplies for over 500 tests. With API POND products, itÔÇÖs easy to keep a beautiful pond. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your pond. API POND Pond Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as koi, catfish, perch, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your pond. Make sure to use all products as directed in order to ensure the best results.