Coral reefs face extinction within 50 years: experts

[justinl]

Andy, the last time rapid ocean acidification occured, there was a mass marine extinction. i think that's all the perspective anyone needs.

as for the calcium reactor point, you forget that reactors are used outside of systems and pH is still normal in the displays. If the pH is high in the display (the ocean in this case), any calcium carbonate that is formed will dissolve.