The API® GH & KH Test Kit accurately measures general hardness (GH) and carbonate hardness (KH) in turtle habitats, pond water, and aquariums. Both parameters matter for aquatic health — GH reflects dissolved calcium and magnesium, KH buffers against pH swings. What It Measures GH (General Hardness) — total dissolved calcium and magnesium KH (Carbonate Hardness) — carbonate and bicarbonate buffering capacity Key Features Liquid reagent kit — drop-by-drop titration Accurate results for turtle, aquarium, and pond water Includes test tubes, reagents, and reference chart Each bottle tests dozens of water samples Currently out of stock — contact us if you need this sooner. Documentation API Turtle GH and KH Test Kit Water Hardness Testing — Instruction Manual (PDF) API Turtle GH and KH Test Kit Water Hardness Testing — Spec Sheet (PDF) Product Video
