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When doing a water change
01 ppm (mg/L) for each 100L of tank water
Green food with Spirulina for bigger herbivorous cichlids
rather than weekly
which helps regulate the balance between calcium and carbonates in aquarium water
API Calcium Test Kit 15 Watt Aquarium LED Light When doing a water changeThe API CALCIUM TEST KIT measures calcium levels as low as 20 mg L to help you keep your reef inhabitants healthy. 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. Includes 2 test bottles,