Seachem Reef Advantage Calcium 500g – Reef Aquarium Calcium Supplement

Seachem Reef Advantage Calcium™ is a premium, non-caustic calcium supplement formulated to restore and maintain natural seawater calcium levels in reef aquariums. Calcium and carbonates are essential for coral skeletal growth, and deficiencies can quickly lead to poor coral health and stalled growth.

This advanced ionic calcium blend operates safely within a pH range of 8.3–8.6 and includes magnesium and strontium in natural utilization ratios (100:5:0.1). Unlike kalkwasser, Reef Advantage Calcium™ will not deplete magnesium or alkalinity when used as directed, making it a safer and more stable solution for long-term reef care.

Available now at Reef freaks, your trusted reef aquarium store.

Key Features:

• Optimized ionic calcium for reef aquariums
• Non-caustic formula (pH 8.3–8.6)
• Supports healthy coral skeletal growth
• Includes magnesium & strontium in natural ratios
• Will not deplete alkalinity when used correctly
• Safer alternative to kalkwasser
• Suitable for SPS, LPS, and soft corals
• Ideal for routine calcium maintenance

Seachem Reef Advantage Calcium 500g is a professional-grade reef supplement designed to maintain stable calcium levels without disrupting aquarium chemistry. Its balanced formulation supports consistent coral growth while protecting magnesium and alkalinity, making it an essential addition to any reef system.