Seachem Reef Calcium is a concentrated (50,000 mg/L) bio-available polyglyconate-complexed calcium designed to maintain calcium levels in the reef aquarium without altering pH. Unlike ionic calcium supplements, which are often limited by the rate of uptake and the potential for precipitation, the polyglyconate complex in Reef Calcium provides a highly efficient delivery system that corals can readily sequester. It is specifically formulated to promote accelerated coral growth and vitality in systems where calcium demand is high.
Reef Calcium offers a unique chemical approach to calcium supplementation, providing benefits that standard calcium chloride products cannot.
Bio-Available Energy Source: The polyglyconate complex serves as an easily used carbohydrate source for corals, providing metabolic energy while delivering essential calcium.
Accelerated Growth: Specifically engineered to stimulate faster skeletal development in SPS, LPS, and soft corals compared to traditional ionic calcium.
Prevents Precipitation: The organic complexing agent helps keep calcium in solution, reducing the risk of it reacting with carbonates and "snowing" out of the water column.
pH Neutral Formula: Will not impact the delicate acid-base balance of your aquarium, allowing you to manage pH and alkalinity independently.
Safe for Sensitive Reefs: Completely non-toxic and ideal for use in heavily stocked reef tanks with a variety of stony corals and calcifying macro-algae.
How much Seachem Reef Calcium should I add?
The standard dose is 5 mL (1 capful) per 80 L (20 US gallons) twice a week. You may increase the frequency based on your coral's consumption, but do not exceed 5 mL per 80 L daily.
Can I use this with Seachem Reef Complete?
Yes! Reef Calcium is excellent for promoting growth, while Reef Complete is optimized for raising and maintaining high ionic calcium levels. Many hobbyists use them together to get the best of both worlds.
Does Reef Calcium affect my alkalinity?
No. It is designed strictly as a calcium supplement and will not raise or lower your carbonate hardness ($KH$).
Seachem Reef Carbonate: The necessary alkalinity partner to ensure your corals have the inorganic carbon needed for calcification.
Seachem Reef Plus: Provides a full spectrum of vitamins, amino acids, and trace elements to further enhance the growth stimulated by Reef Calcium.
Seachem MultiTest Calcium: An essential test kit to monitor your calcium levels and ensure they stay within the target 380–450 mg/L range.
