API CALCIUM SALTWATER AQUARIUM TEST KIT, 1 COUNT

Calcium is one of the most important elements in a reef aquarium. Reef invertebrates, such as corals, crustaceans, molluscs, and even some species of encrusted algae, need calcium to grow and stay healthy. Over time, the level of calcium decreases as it is used by invertebrates, or When it reacts with excess phosphate. The API® CALCIUM TEST KIT measures calcium levels as low as 20 mg/L to help you maintain healthy coral reef populations.