The C-Balance Two Part Supplement from Two Little Fishies is a comprehensive calcium and alkalinity maintenance system designed for marine aquariums. This two-part solution consists of bottle A, which provides the necessary calcium component, and bottle B, offering the alkalinity component. Together, these bottles maintain stable water chemistry by replenishing calcium and carbonate alkalinity with precise ratios of major and minor ions including magnesium and strontium, essential for optimal coral growth and health. This product is ideal for advanced reef aquarists who seek to ensure their aquarium's water conditions are perfectly balanced, supporting the thriving environment needed for corals and other delicate marine life.