API 5 in 1 Pond Test Strips provide accurate results for your pond’s water conditions using a highly precise color chart for easy-to-read results. Measured parameters include pH, Nitrite, Nitrate, Carbonate Hardness, and General Hardness. A Snap-cap container keeps unused strips protected and dry, maintaining product stability and extending the shelf life of the product. No separate test vial is required – simply dip a test strip directly into your pond for easy reading of your pond’s levels. Testing your water has never been so simple!