The implications for coral aquaculture and the aquarium hobby seem clear. When scleractinian corals are fed during daytime (i.e. when the lights are on), a nightly disruption of calcification may be prevented. In addition, maintaining a high oxygen concentration in the aquarium is vital as corals seem sensitive to low saturations, both in light and in darkness. Fortunately, foam fractionators are an ideal means of aerating the water (although they do seem to remove food particles from the water). For those seeking to grow corals efficiently, these insights are highly relevant as the aragonite skeleton accounts for the bulk of coral biomass (Davies 1989).
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