Red Sea Calcium Foundation A 5L is a premium liquid calcium supplement specifically formulated to support the robust growth and skeletal development of corals and other essential marine organisms in your reef aquarium. Calcium is a fundamental building block for coral skeletons, making this product indispensable for maintaining a vibrant and thriving aquatic environment. It ensures your corals receive the vital elements needed for calcification and overall health.

This essential supplement comes in a substantial 5L container, offering an ideal solution for larger aquariums or for hobbyists who prefer to maintain a continuous, long-term supply of calcium. Its user-friendly formula integrates seamlessly into existing aquarium systems with clear dosing instructions, where 1mL raises the calcium level of 100 liters (25 gallons) by 2 ppm. As a core component of Red Sea's comprehensive Reef Care Program, it works synergistically with other Foundation supplements to achieve and sustain the perfect elemental balance in your reef tank.

Red Sea Calcium Foundation A 5L is best suited for dedicated reef aquarists looking for a high-quality, reliable, and large-volume calcium source to support a healthy and growing coral population. It is particularly beneficial for those managing larger systems or seeking to simplify their dosing routine with a generous supply. Choosing this supplement ensures you are providing ultra-pure ingredients as part of a proven system designed for optimal reef success and sustained coral vitality.