Seachem Reef Reactor Lg 4L is a premium, high-purity aragonite media specifically designed for use in saltwater reef aquarium calcium reactors. It serves as a vital source of essential elements, slowly dissolving with the controlled addition of CO2 to maintain optimal ionic balance and foster robust growth and vibrant coloration in corals and other calcareous organisms.

As it dissolves, this superior media consistently delivers critical elements including calcium, magnesium, strontium, potassium, and carbonates, all crucial for a thriving reef environment. It excels at increasing and stabilizing alkalinity, which in turn supports a stable pH and encourages the rapid formation of coral skeletal material. With a grain size of approximately 1-3 cm, it boasts high levels of both calcium and magnesium, offering balanced supplementation. Furthermore, it features the highest level of soluble potassium among competing brands while exhibiting the lowest levels of aluminum and phosphorus.

This product is an excellent choice for dedicated reef aquarists utilizing calcium reactors who seek an effective and balanced method of supplementation for rapid growth and propagation of corals and other calcareous animals. Its comprehensive elemental contribution and purity make it ideal for maintaining a stable and nutrient-rich environment essential for a flourishing reef aquarium.