API Calcium Saltwater Aquarium Test Kit, 1 count

Calcium is one of the most important elements in reef tanks. Marine invertebrates, such as corals, jellyfish, mollusks, and even some types of calcareous algae, need calcium to grow and stay healthy. Over time, calcium levels drop as it is used by invertebrates or when it reacts with excess phosphate. The API® Calcium Test Kit measures low calcium levels down to 20 mg/L to help you maintain the health of your reef inhabitants.

Contains two test bottles, easy-to-read instructions, and a glass test tube.