Tropic Marin

Carbo-Calcium Powder Calcium & Alkalinity Additive

Grouped product items
Product Name Qty
700g (1.5lbs) Carbo-Calcium Powder

SKU: 211783

In stock


Earn 22 Reward Points

- +
1400g (3lbs) Carbo-Calcium Powder

SKU: 211784

In stock


Earn 36 Reward Points

- +

Concentrated Calcium & Alkalinity for Advanced Reefers!

Tropic Marin Carbo-Calcium contains a balanced ratio of calcium and carbonate (alkalinity) in a single solution. Traditionally two or more solutions are required but Carbo-Calcium relies on biological processes to release calcium and carbonate from a single liquid without the worry of precipitation or oxygen depletion. There are no by-products or unwanted excess CO2, phosphates, nitrates, or other pollutants while keeping a stable pH. 

  • A little powder makes a lot of liquid
  • Easy to mix with RODI water
  • Maintains proper ionic balance
  • Doesn't increase salinity (no sodium chloride)
  • Single solution for calcium & alkalinity
  • Suitable for all size aquariums
  • No byproduct formation
  • Suitable for all types of corals
  • Easy to use 
  • Dosing pump ready once mixed


Two Sizes Available:

  • 700 g
  • 1400 g




  • The 700 g (1.5 lbs.) can of Carbocalcium Powder is sufficient for 5 liters (1.3 gallons) liquid solution, the 1400 g (3 lbs.) can for 10 liters (2.6 gallons) liquid solution.
  • 6 level measuring spoons of Carbocalcium Powder are dissolved in 1 liter (0.26 gallons) reverse osmosis water to create the liquid mineral solution.


  • Starting with a daily dose of 5 ml of Carbo-Calcium liquid solution per 100 liters (26 gallons) of total system volume. Increase the daily dose by monitoring the alkalinity. Increase the dose by 2.5 ml per 100 liters until a constant alkalinity of 7-9 dKH is achieved. 


Note: In larger systems, Carbo-Calcium Powder can be added directly to a high flow area of your tank without any pre-mixing.


Maximum daily dose - 25 ml of Tropic Marin Carbo-Calcium per 100 liters.


Tropic Marin Carbo-Calcium Powder Contains: (per 700g)

  • 40,000 mg Calcium
  • 5,600 dKH
More Information
Product Name Carbo-Calcium Powder Calcium & Alkalinity Additive - Tropic Marin
SKU Carbo-Calcium Powder - Tropic Marin
Write Your Own Review
You're reviewing:Carbo-Calcium Powder Calcium & Alkalinity Additive
Your Rating
Only registered users can write reviews. Please or

Product Questions

Does this increase, decrease, or keep PH neutral?
Question by: Lawrence on Mar 23, 2022, 12:52 AM
Hey Lawrence, thanks for the question! TM indicates that it will keep a stable pH
Answer by: James Johnson (BRS Staff) on Mar 24, 2022, 3:27 PM
Does this product expire and if so how long until it does
Question by: Joshua Perez on Feb 5, 2020, 8:22 PM
Hey there,

As long as you keep it well sealed and dry it will last for as long as you need.

Take care
Answer by: Thomas Billington on Feb 6, 2020, 8:51 AM
Sign Up Now