Small Polyp Stony corals, also known as SPS corals, are a favorite among experienced and novice coral hobbyists. Although these corals do require certain conditions in order to thrive, they are typically easier to care for than Acropora corals. These hard corals build a calcium carbonate internal skeleton that forms mesmerizing shapes and makes up the bulk of the reef structure. Due to their skeleton, SPS coral frags require a consistent level of calcium and alkalinity to avoid weakening. They also require a good amount of light and high-water flow in order to meet their full potential. World Wide Corals has an unbeatable selection of SPS corals for sale that feature practically every color imaginable. SPS corals are among the most rewarding corals to grow and observe. Browse our selection of SPS coral online below.