The design of the Korallin reactors is all about ease of use so that once they are set-up they are simple to adjust to get the best performance. In the most exacting environments for example where the tank is filled with fast growing acropora or sps corals. Calcification rates in this type of tank may run as high as high as 15-20kg per square meter per year. It is useful to be able to control the internal pH of the reactor so that it is set to the optimal level to dissolve the media.