Aquasonic Calcium-Sup 250ml
Many marine invertebrates require calcium to build their skeletons. They extract their calcium from seawater which has levels around 380ppm. One treatment of Calcium-Sup raises the level by approximately 50ppm. Calcium levels of 400 to 450ppm have been found to be beneficial to then growth of hard corals and coralline algae, mulluscs, crustaceans and some marine plants.