Letter Grade 4.0 Point Scale (+/-) A+: 4.0: A: 4.0: A-3.7: B+: 3.3: B: 3.0: B-2.7: C+: 2.3: C: 2.0: C-1.7: D+: 1.3: D: 1.0: D-0.7: F: 0.0
Coral calcium is a salt of calcium derived from fossilized coral reefs (primarily from limestone and coastal deposits).It has been promoted as an alternative, but unsubstantiated, treatment or cure for a number of health conditions.oral calcium is a source of calcium, which is an essential mineral for human life. Coral has a chemical structure that is very similar to the composition of human bone and is sometimes used as material in bone grafts.
Oftentimes, LPS corals are the next step an advancing hobbyist takes after successfully keeping some of the hardier soft corals. The largest difference in husbandry comes with lighting requirements (generally being much higher), and having to pay closer attention to the calcium and alkalinity of the tank water, and supplement accordingly, either with 2-part Ca/Alk additives, Kalkwasser or a Calcium Reactor.