How does my coral grow? (LPS)

[reefwars]

not sure on the science part of it but i know for corals like hammers with hard shells ,use calcium to grown there shells kinda like our bones do.theres alot more to it than that, im sure they need all trace elements to grow everything in conjunction together.some corals and clams have a high demand for calcium and can eat it up pretty fast if you pay attention to the tests