Tropic Marin Bio-Calcium
Tropic Marin Bio-Calcium

Roll over image to zoom

Double tap image to zoom

Tropic Marin Bio-Calcium

Price pending

Sold in stores only. Selection varies by store. Check your local store for availability.

Tropic Marin Bio-Calcium

Price Match Guarantee Details

productDisplayJS.setSelectedAttribute("","", "entitledItem_90855"); productDisplayJS.notifyAttributeChange("90855","entitledItem_90855",false,false);

35% off your first order & free shipping on $35 when you select in cart!

Order now to get it by

35% off your first order!

repeat delivery
  • 5% off and free shipping on all subsequent orders.
  • FREE shipping on $35 on your first order.
  • No commitments. Pause or cancel at anytime.

Additional Details

64 oz., This powder is the ideal source of both calcium carbonate for the corals and carbon dioxide for the zooxanthellae in your aquarium. Contains all 70 trace elements in the concentrations found in natural seawater.

  • Adds all 70 trace elements including strontium, molybdenum & iodine
  • Only natural substances are formed when dissolved
  • Add directly to your tank, no need to pre-mix or drip
  • Supplies calcium carbonate for corals & CO2 for the zooxanthellae
  • Will not influence pH of aquarium if used as directed
  • Measured amount of calcium in a truly ionically balanced formula
. For more information go to
  • SKU1563858
  • Primary BrandTropic Marin
  • Days to ShipShips in 2-3 Business Days
  • Weight64 OZ

All calcareous animals, especially corals, need calcium and carbonates to grow and flourish. However the growth rate of corals depends mostly on the zooxanthellae (algae) that live symbiotically within them. These algae present the coral with precious carbohydrates of their own metabolism. As they photosynthesize, they use carbon dioxide from the water, which enables the coral to precipitate calcium carbonate in its skeleton. Only when calcium and carbon dioxide are available together can this symbiotic relationship work. Tropic Marin Bio-Calcium is the ideal source of both calcium carbonate for the corals and carbon dioxide for the zooxanthellae. Many calcium supplements add undesirable by-products to the water, or like Kalkwasser, influence pH. When Tropic Marin Bio-Calcium is dissolved in the aquarium, all 70 trace elements are added and no unnatural by-products are formed. Tropic Marin Bio-Calcium will not alter the pH level if used in accordance with the instructions. Natural sea water contains on average 400-410 ppm of calcium and is typically saturated at this level. It is important not to exceed 450 ppm, as super saturation can result in the calcium surplus precipitating out of the solution, taking desirable trace elements with it. We recommend the use of a Tropic Marin calcium test kit and Tropic Marin Bio-Calcium to ensure these proper calcium levels.