Calcium plays a crucial role in aquariums, and it should remain in proper balance with alkalinity (KH)When the balance is off, it can lead to poor growth and tissue necrosis. Calcium uptake in aquariums can change over time, so regular testing is recommended to ensure proper dosing.
While calcium is more closely monitored in saltwater systems, freshwater aquariums also benefit from routine calcium testing. Aquarium plants require calcium for healthy leaf growth, and invertebrates such as shrimp and snails rely on adequate calcium levels to maintain shell strength and support proper molting.