Reef Advantage Calcium 250g, Aquarium Supplement — Seachem

Support healthy coral growth and a stable reef with Seachem Reef Advantage Calcium, a concentrated 250g supplement formulated for marine aquariums. Each scoop helps maintain ideal calcium levels for stony corals, coralline algae, and other calcifying invertebrates.

• Concentrated Calcium — raises and maintains calcium without spiking pH.
• Reef-Safe Formula — designed specifically for marine and reef aquariums.
• Supports Coral Growth — helps stony corals and coralline algae thrive.
• Includes Trace Minerals — strontium and magnesium support balanced reef chemistry.
• Economical 250g Size — lasts months in typical home reef tanks.
• Easy Dosing — dissolves cleanly with included instructions.

For reef hobbyists who want predictable, healthy growth, this reef calcium supplement is a trusted staple. Seachem Reef Advantage Calcium pairs well with Reef Advantage Magnesium and Reef Buffer to keep saltwater aquarium chemistry stable and your corals coloring up beautifully.