If many coral propagators tend to be secretive, Than Thein has always been generous with sharing what he has learned at his successful Tidal Gardens coral farm in Copley, Ohio. His latest video is highly recommended for anyone planning a new frag tank (or even your next display aquarium).
A Calcium Reactor is essentially a chamber that recirculates water and slowly dissolves calcium carbonate media by slow injection of carbon dioxide.
Calcium and Alkalinity are important chemical parameters in reefs. They are used by stony corals to build their calcium carbonate skeletons.
Think corals are fussy eaters? Watch them attacking and ingesting dry pelleted food.