Seachem Reef Advantage Magnesium 300g – Concentrated Reef Supplement

Seachem Reef Advantage Magnesium 300g is a highly concentrated (80,000 ppm) dry magnesium supplement formulated to safely restore and maintain natural magnesium levels in reef aquariums. It uses an optimised blend of magnesium, chloride, and sulfate salts to correct deficiencies while preserving the natural ionic balance of seawater.

Unlike liquid magnesium supplements, Reef Advantage Magnesium contains no ammonia, ensuring cleaner dosing and safer long-term use. Maintaining proper magnesium levels is essential for stable pH, balanced alkalinity, and effective calcium supplementation—especially in systems using kalkwasser or carbonate additives.

This powdered format allows precise dosing for beginner, advanced, and expert reef keepers.

Key Features:

• Highly concentrated magnesium supplement (80,000 ppm)
• Restores depleted magnesium levels safely
• Maintains natural seawater ionic balance
• Contains no ammonia (unlike liquid supplements)
• Helps stabilise pH and alkalinity
• Essential for proper calcium and alkalinity control
• Ideal for reef aquariums using kalkwasser
• Powdered form for precise dosing
• Suitable for beginner to advanced reef systems

Seachem Reef Advantage Magnesium 300g provides reef aquarists with a powerful, ammonia-free solution for maintaining optimal magnesium levels. Its high concentration, precision dosing, and balanced formulation make it an essential supplement for healthy corals, stable pH, and effective calcium management. Available now at Reef Freaks.