The API KH Carbonate Hardness Test Kit provides fast, accurate testing to help aquarists maintain stable aquarium conditions. Carbonate hardness (KH) is essential for preventing sudden pH swings that stress fish and increase disease risk.
For marine reef systems, all organisms rely on calcium and carbonate to build their skeleton structure by extracting these substances from saltwater, so testing for both is essential for successful reef keeping.
Test weekly to accurately measure and monitor KH levels, ensuring your aquarium stays balanced for healthy fish, plants, and coral growth in both freshwater and marine tanks.
Key Features
Accurate carbonate hardness (KH) test for freshwater aquariums, marine tanks, and reef systems
Helps prevent pH fluctuations that can harm fish
Supports healthy fish, aquarium plants, and coral growth
Easy‑to‑use kit with clear results
Recommended for weekly testing to maintain stable KH in aquarium systems
Complements calcium testing for reef tank livestock health
Specifications
Includes one KH test solution bottle
Glass test tube with secure cap
Simple step‑by‑step instructions
Suitable for freshwater aquariums, marine tanks, and reef systems
