[Randy Holmes-Farley]

Thanks, Tatu.

Since there are many ways that elements get depleted in addition to calcification (skimming, GAC, macroalgae growth, organism tissue growth, GFO, etc), I'm not sure that adding a fixed trace element cocktail based on what ends up in calcified coral skeletons is really a sound plan. And that ignores the fact that what is in the skeletons of different organisms differs dramatically from one species to another, so won't be fixed across all aquaria.