If you are running a coral reef tank
, there's one thing you have to make sure: You need a constant supply of calcium in the water. Corals use up calcium to form their exoskeletons. Without calcium, they will not be able to form these exoskeletons. Without proper exoskeletons, corals will fail to grow and develop normally and healthily.
You can make sure that your coral reef tank gets enough calcium by using supplements such as the Seachem Reef Fusion Two-Part System 1 & 2 Calcium and Carbonate Supplement from Pet Store
. This supplement comes in two parts, so when you buy it, you'll get two bottles. The first bottle gives calcium while the second bottle gives alkalinity. These two are meant to be used as a pair - a system - that supplies calcium to the reef tank while keeping the alkalinity levels suitable. Together, they work to provide the necessary carbonate to corals that need it for their growth and development. This supplement has the highest concentration of calcium so it's really good value for your money.
The Seachem Reef Fusion Two-Part System 1 & 2 Calcium and Carbonate Supplement is also a great source of elements such as boron, magnesium, manganese, strontium, molybdenum and iron.