High water quality is also a necessity. The water must be clear and low in nutrients such as phosphates and nitrates. In the ocean, millions of gallons of empty water are flushed past these corals every minute, and the SPS gardener's goal should be to replicate these conditions. Strong currents must be created using powerhead pumps and air stones, water changes will have to be made semi-frequently and the aquarist will have to make sure the filtration system is functioning top-notch. For filtration we recommend the bullet-proof reef system which depends on a porous aragocrete rock and a live sand bed full of diverse organisms.
SEVERAL GROWTH FORMS OF ACROPORA