The Waterbox Alkalinity Test Kit provides fast and accurate measurement of carbonate hardness (dKH) in saltwater aquariums. Alkalinity is essential for maintaining stable pH and supplying the carbonate ions corals need to build strong calcium carbonate skeletons. Proper levels help prevent rapid pH swings, support healthy coral calcification, and contribute to overall system balance.

Keeping alkalinity within the recommended 7.5–9.5 dKH range ensures consistent growth, stable water chemistry, and long-term reef vitality. Regular testing alongside calcium and magnesium helps maintain a balanced and thriving environment. Each kit provides enough reagents for roughly 80–100 individual tests.

Each kit provides enough reagents for roughly 80–100 individual tests.