Tropic Marin

Carbo-Calcium Liquid Calcium & Alkalinity Additive

Grouped product items
500mL Carbo-Calcium

SKU: 211781

In stock


- +
1000mL Carbo-Calcium

SKU: 211782

In stock


- +

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.

  • No mixing required
  • Single solution for calcium & alkalinity
  • Maintains proper ionic balance
  • Doesn't increase salinity (no sodium chloride)
  • Suitable for all size aquariums
  • No byproduct formation
  • Suitable for all types of corals
  • Easy to use 
  • Dosing pump ready


Two Sizes Available:

  • 500mL
  • 1000mL



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. 


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


Tropic Marin Carbo-Calcium Contains: (per 1000 mL)

  • 40,000 Calcium
  • 5,600 dKH
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Product Questions

Does it raise PH ?
Question by: Herbert A Maynard on Mar 1, 2024, 9:08 AM
Hey there,
Thank you for reaching out to us. This product will not raise your Ph. But will help to maintain your calcium and alkalinity. Please let me know if you need anything further.
Answer by: Thomas Wofle (BRS Staff) on Mar 1, 2024, 10:35 AM