• High quality, maximum strength ionic calcium solution
• Safely raise the calcium level in marine aquariums
• Provides essential calcium for increased growth rates in corals, coraline algae, crustaceans and many other marine organisms
• Contains no acetate, gluconates, polygluconates 
• Phosphate and silicate free. May be used simultaneously with Kalkwasser.

ReefBasis - Calcium is a high quality, maximum strength ionic calcium solution designed to safely raise the calcium level in marine aquariums, providing essential calcium for increased growth rates in corals, coraline algae, crustaceans and many other marine organisms. It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium.
It is phosphate and silicate free. May be used simultaneously with Kalkwasser.


Use in aquarium keeping.
Proper control of calcium level is imperative for the health and growth of corals and many other invertebrates. If the calcium concentration is too low, growth rates will suffer. If it is too high, alkalinity or buffering capacity will be diminished, leading to possible instability of pH. Sufficient magnesium levels are also necessary to maintain the proper balance. It is therefore recommended that the hobbyist measure and control the levels of calcium, magnesium and alkalinity on a regular basis. Strontium is also required for formation of aragonite.

Continuum recommends that you maintain a calcium level of between 410 and 450 mg/L (ppm), an alkalinity level of 7 to 11 dKH (2.5 to 4 meq/L), and a magnesium level of 1250 to 1350 mg/L (ppm). Note: Aquarists keeping SPS corals should consider keeping alkalinity at 7 to no more than 9 dKH (2.5 to 3.21 meq/L). Do not add calcium and buffering (alkalinity) products at the same time. Doing so will cause unnecessary precipitation and possible cloudiness.


Directions and protocol.

1. Shake well prior to use.
2. Add 1 capful (5 ml) per 50 US-gallons (200 L) of marine aquarium water 3 to 4 times per week.
3. For best results, measure the calcium concentration and add as required to maintain the concentration between 410 and 450 mg/L.

Expert use.
Dosing through use of a drip system is a superior method of addition. Do not mix with buffers or alkalinity supplements prior to addition. You may mix it with strontium, magnesium, and many other supplements.

See our website for compatibility of supplements.

Determine the amount of calcium consumption during the time it takes add the entire volume of your drip system. Determine the amount of ReefBasis Calcium to add in milliliters by multiplying your tank capacity in gallons by the amount you want to raise it in mg/l (ppm) and by 0.027.

(Example: if you have a 100 gallon tank and you want to raise the level by 10 ppm with the entire dose, you would multiply 100 x 10 x 0.027 which equals 27 ml of ReefBasis Calcium or about 5-1/2 capfuls).


Caution: Keep out of reach of children. Not for human consumption. Contains calcium chloride, if ingested drink water. If in eyes flush with water.