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Substrate for RAC
Substrate for Calcium Reactor (RAC)
The substrate for calcium reactors developed with the popularization of RACs in the 1990s, when coral-rich reef aquariums required a continuous and stable supply of calcium and carbonates. Inspired by the natural calcareous structures of reefs, this medium forms the basis of the reactor's operation.
Most commonly composed of high-purity natural aragonite, the substrate is gradually dissolved by controlled CO₂ injection into the reactor. It then releases calcium, carbonates, and essential trace elements for coral calcification and KH stability.
The quality of the substrate directly influences the regularity of dissolution, the purity of the supply, and the longevity of the medium. Suitable for aquariums heavily populated with hard corals, it helps maintain a stable and efficient reef environment over the long term.
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