Sea Salt For Hard Corals
Generally there are two main types of corals - hard and soft. The framework of a coral reef is composed of the calcareous skeletons of many corals. As a coral grows new polyps replace old polyps which become the calcareous skeleton.
Humans need food, water and shelter to survive. These things are also important to corals, they need nutritions. Like Ca,Mg,Sr etc microelements.
Blue Treasure Sea Salt Mg-1350mg/L,Ca-420mg/L,kH-9'C dH,Sr-9.5mg/L.