Measures calcium levels as low as 20 mg/L for precise monitoring
Includes two test bottles for convenient repeated sampling
Comes with easy-to-read instructions for hassle-free testing
Glass test tube ensures accurate and reliable results
Summarized by Shop
Calcium is one of the most important elements in a reef aquarium. Reef invertebrates, such as corals, crustaceans, mollusks, and even some type of encrusting algae, need calcium to grow and remain healthy. Over time, the calcium level drops as it is used by invertebrates, or as it reacts with excess phosphate. The API® CALCIUM TEST KIT me