Aquaforest Ca Plus is a highly concentrated liquid calcium supplement for marine and reef aquariums. It raises and maintains calcium in a readily assimilated form, supporting strong coral skeletal growth and steady calcification. Ca Plus is one of the reef "big three" alongside KH Plus and Mg Plus. Benefits Raises calcium quickly in an easily absorbed form Supports coral growth, calcification, and healthy skeletal structure Corrects calcium shortages and sudden drops between water changes Works hand in hand with alkalinity and magnesium dosing Concentrated, economical liquid that mixes cleanly How to Use Shake well before use. 10 mL of Ca Plus raises calcium by roughly 15 ppm in 27 US gallons (100 L) of aquarium water. Do not exceed 20 mL per 27 US gallons in a single day. Aim for a reef calcium level of 380 to 460 ppm. Confirm magnesium is within range before adjusting calcium or alkalinity, and keep calcium and alkalinity balanced for stable, predictable results. Specifications Type Liquid calcium supplement (calcium chloride) Volume 250 mL Dose 10 mL raises Ca ~15 ppm per 27 US gal; max 20 mL per 27 gal per day Target Level 380 to 460 ppm calcium Aquarium Type Marine and reef Made In Poland Recommended Pairings KH Plus and Mg Plus to balance the reef big three Track your levels with reef test kits for calcium, alkalinity, and magnesium Browse the full Aquaforest line Frequently Asked Questions How much will Ca Plus raise my calcium?About 15 ppm for every 10 mL in 27 US gallons. Dose gradually and retest rather than making large single corrections. Why test magnesium first?Low magnesium makes it hard to hold calcium and alkalinity. Keep magnesium near natural seawater, around 1300 to 1400 ppm, so your calcium stays stable. Can I dose calcium and alkalinity together?Add them separately, spaced out in time and in different areas of flow, never at the same spot at once, to avoid precipitation.
