Seachem Reef Advantage Magnesium 600g – High Strength Reef Supplement

Seachem Reef Advantage Magnesium 600g is a highly concentrated (80,000 ppm) dry magnesium supplement formulated to restore and maintain proper 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 safer dosing and cleaner reef systems. Maintaining correct magnesium levels is essential for stable pH, balanced alkalinity, and effective calcium supplementation—especially in aquariums using kalkwasser or carbonate additives.

The larger 600g pack is ideal for medium to large reef systems or long-term maintenance dosing.

Key Features:

• Highly concentrated magnesium supplement (80,000 ppm)
• Restores depleted magnesium levels efficiently
• Maintains natural seawater ionic ratios
• Ammonia-free formula for safer reef dosing
• Helps stabilise pH and alkalinity
• Essential for proper calcium balance
• Ideal for kalkwasser and carbonate-based systems
• Dry powder for precise and flexible dosing
• Suitable for beginner, advanced, and expert reef keepers

Seachem Reef Advantage Magnesium 600g delivers a powerful, ammonia-free solution for restoring and maintaining optimal magnesium levels in reef aquariums. Its high concentration, balanced formulation, and precise dosing make it an essential supplement for coral health, pH stability, and calcium efficiency. Available now at Reef Freaks.