Check the listing for details. SEACHEM REEF FUSION PART 2 ALKALINITY - 2 LITER FOR MARINE REEF AQUARIUMS. Condition: New. Listed at 25.99 USD. Seachem Reef Fusion 2 Listing is for ( 1 ) Bottle of: SEACHEM REEF FUSION 2 - 2 LITER Reef Fusion™ Provides 100,000 mg/L of ionic calcium Restores and maintains alkalinty Most concentrated two part system; simple 1:1 ratio This listing is only for ( 1 ) 2 LITER bottle of SEACHEM REEF FUSION 2 ( Seachem Reef Fusion 1 is not included but sold seperately ) Description: Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provides calcium, while Reef Fusion 2™ provides alkalinity. When used together, the Reef Fusion™ system will maintain calcium and alkalinity levels. Reef Fusion 2™ contains a mixture of carbonates and bicarbonates at an alkalinity of 4400 meq/L. It is designed to restore and maintain alkalinity in the reef aquarium and provide calcareous species with the essential carbonate needed for growth. When used as directed, Reef Fusion 1™ and Reef Fusion 2™ will maintain the critical levels of calcium and alkalinity necessary for healthy coral growth, while providing biologically appropriate levels of other elements and trace minerals. Directions: Dose aquarium every 1-2 days. Shake well before using. Add 1 mL of Reef Fusion 1™ per 25 L (6.5 US gallons) of water. (For reference purposes, the cap holds 5 mL.) Add this to a high current area of the tank. Wait a few minutes, then add Reef Fusion 2™ in the same manner, 1 mL per 25 L (6.5 US gallons), after shaking well. It is preferred that the two products be added to separate locations in the tank. This dose contributes 4 mg/L of calcium, and 0.176 meq/L of alkalinity. Never mix Reef Fusion 1™ with Reef Fusion 2™ directly. This listing is only for ( 1 ) 2 LITER bottle of SEACHEM REEF FUSION 2 ( Seachem Reef Fusion 1 is not included but sold seperately ) Please feel free to contact me for International and combined auction shipping rates or with any questions or concerns that you may have about my products. Thank you !