Seachem Reef Complete - 2 Litre Seachem Reef Complete - 2 Litre is a larger-format liquid ionic calcium supplement for reef aquariums, helping restore and maintain calcium while supplying magnesium and strontium in typical utilization ratios. Seachem Reef Complete for Larger Reef Calcium Demand The 2 Litre size is suited to larger reef aquariums, regular calcium supplementation, and systems with steady coral growth. Reef Complete restores calcium without affecting pH and complements carbonate alkalinity support products. Liquid Calcium Benefits for Coral Growth Restores and maintains calcium for reef aquariums. Highly concentrated 160,000 mg/L ionic calcium supplement. Includes magnesium and strontium in typical utilization ratios. Liquid format is simple to dose and fully soluble. Does not affect pH when used as directed. Larger bottle size is practical for regular maintenance dosing in active reef systems. Seachem Reef Complete Dosing Details Product type: Liquid ionic reef calcium supplement Primary use: Calcium restoration and maintenance Calcium concentration: 160,000 mg/L Added support: Magnesium and strontium Target calcium range: 380 to 420 mg/L Standard dose: 5 ml per 80 L (20 US gallons) twice weekly Expected increase: About 10 mg/L calcium per standard dose Package size: 2 Litre Directions for Seachem Reef Complete Use 1 capful or 5 ml per 80 L (20 US gallons) twice weekly. Test calcium every 2 weeks and adjust the amount or frequency based on aquarium demand. Maintain calcium between 380 and 420 mg/L. Do not exceed 12.5 ml per 80 L per day. Excess calcium may reduce carbonate alkalinity. Do not directly mix with carbonate supplements; dose calcium and carbonate additives on alternate days or at least 30 minutes apart. What's Included 1 x Seachem Reef Complete - 2 Litre