Calcium 850 g — Stable Calcium for Corals in Reef Aquariums - Aquaforest

Aquaforest Calcium 850 g — stable calcium for thriving corals

Aquaforest Calcium maintains constant calcium levels and helps regulate pH in reef aquariums. In seawater, a stable calcium value is essential for the healthy development of corals and coralline algae. Aquaforest recommends 380-460 mg/L (ppm) in reef tanks.

Precise manufacturer dosing

Dissolve 50 g of Calcium in 1000 ml of RODI water. 100 ml of this solution raises calcium by 18 mg/L (ppm) in 100 L of water. For one-time adjustments, 10 g in 100 L raises the level by about 36 mg/L. Never raise calcium by more than 20 ppm per day, and test your water before every dose. Calcium and Magnesium can be combined into one solution. Contains calcium chloride (CaCl2) — wear eye protection when handling and keep out of reach of children.

Why reefers rely on Aquaforest Calcium

• Keeps calcium constant for stony corals and coralline algae
• Dissolves quickly, no magnetic stirrer needed
• Can be combined with Magnesium in one solution
• Helps regulate pH

For complete ionic balance, pair with KH Buffer and Reef Mineral Salt. Also available in a 3.5 kg size for larger systems.

Why buy at ReefSolution

As an authorized Aquaforest dealer in Canada, we use and test the products we sell. Complete your routine:

• Aquaforest Magnesium 750 g — stable magnesium is required to hold calcium levels
• Aquaforest KH Buffer 1200 g — stable alkalinity, calcium's direct partner
• Aquaforest Calcium Test Pro — accurate testing before every dose

Frequently asked questions

How do I dose Aquaforest Calcium in a reef tank?

Dissolve 50 g in 1000 ml of RODI water: 100 ml of solution raises calcium by 18 ppm per 100 L. Always test your water before dosing.

What calcium level should I target in a reef aquarium?

Aquaforest recommends 380-460 ppm, never raising it by more than 20 ppm per day.

Can I mix Aquaforest Calcium and Magnesium together?

Yes, the manufacturer confirms they can be combined into one solution.