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ECO Calcium Plus

Description: Provides calcium enhancement in all reef systems.

Type: Marine Supplement

Main Points:

• Phosphate and Nitrate Free

• Provides immediate, bio-available calcium and other major ions for all marine invertebrates

• Encourages purple and corallie algae growth in reef systems


Calcium is one of the major minerals found in all sea salt mixes. However, it is rapidly depleted from aquarium water through biological processes — it is used up by the organisms in the system. It is essential to the health and well-being of the corals in a reef aquarium that all vital parameters in the system be maintained at near seawater levels, including calcium (420-430 ppm), carbonate alkalinity (7 dKH) and magnesium (1300-1400 ppm), which are essential for optimal coral growth. ECO Calcium Plus is an ionically balanced product that will replenish and maintain calcium in the reef aquarium at acceptable levels. Regular use will ensure lush growth of purple, pink and green calcareous algae, and stony corals. ECO Calcium Plus will not adversely affect the system pH. 

Directions for use:

Test the calcium level in the system with a reliable test kit before dosing with ECO Calcium Plus. If the calcium concentration is below 400 ppm, do the following: In a separate container, mix 40 grams of ECO Calcium Plus powder in 1 U.S. gallon (3.8 liters) of deionized/reverse osmosis freshwater to form a stock solution. Add 1 ounce (30 ml) per 30 U.S. gallons (50 ml/200 liters) per day of the Eco Calcium Plus stock solution and 1 ounce (30 ml) per 30 U.S. gallons per day of ECO Kalkwasser saturated solution until a calcium concentration of 420 ppm is reached.Because the addition of ECO Kalkwasser saturated solution (calcium hydroxide) will cause pH to rise, which may adversely affect corals and fish, the ECO Kalkwasser saturated solution should be administered at night, when photosynthetic organisms are inactive and pH is thus lower. Add the solution slowly, either manually, drop by drop or via a thin air-line tube.

Considerations for use:

To encourage purple coralline algae growth, use ECO CALCIUM Plus and ECO Kalkwasser solutions in equal amounts. This calcium supplement method is also known as the two part calcium A & B.


For aquarium use only. Keep out of reach of children. Not for human consumption.


Calcium ions, carbonate, and 70+ minerals and trace elements found in natural seawater

Sizes Available:

Concentrate 6 80-gram pouches (each pouch makes 1 gallon of solution)

Copyright EcoSystem Aquarium, Inc. ® 2007