Reef Code A is the calcium-bearing component of a precise two-part dosing system designed to replenish calcium and carbonates in saltwater aquariums. When used in equal amounts with its counterpart, Reef Code B, this product delivers these essential elements in the exact ratio found in natural seawater. This ionic balance ensures that reef-building organisms receive the stable foundation they need for healthy skeletal growth without disrupting water chemistry stability.

Formulated by a marine scientist, this concentrated solution is significantly stronger than many competing products while remaining free of phosphates, silicates, and organic materials that can fuel algae blooms. The additive includes beneficial trace elements like magnesium and strontium to support overall coral health and calcification rates. It is specifically designed to simplify the maintenance process by allowing aquarists to dose a single bottle alongside its partner to achieve consistent parameters within the ideal 412 to 450 ppm calcium range.

This system is best suited for reef keepers with active SPS corals, clams, and calcareous algae that consume high levels of calcium and alkalinity. By eliminating the need to mix separate bottles or guess dosing ratios, it provides a reliable method for maintaining stable water chemistry in both small and large reef aquariums. Aquarists seeking a scientifically backed approach to support robust coral growth and prevent parameter swings will find this product an essential part of their daily maintenance routine.