The manufacturer informs:

Overview

High purity calcium powder.

It increases calcium concentration in marine aquaria, providing one of the most important elements for growth for corals and other reef-building invertebrates.

More concentrated and more economical than liquid calcium solutions; designed for enthusiasts running multiple reef aquaria.

Formulated by a marine scientist.

Technical Background

Calcium is indispensable for the formation of aragonite, the material from which the skeleton of reef-building invertebrates such as corals, bivalve molluscs, tube worms, etc. is made. In reef aquaria, keeping Calcium in the range of 412 - 450 ppm will allow corals and other reef-building organisms to grow rapidly if the other physical and chemical requirements are met. [Magnesium, Strontium, and carbonate ions are also present in aragonite, and their importance in a reef aquarium cannot be underestimated]. The rate at which Calcium is withdrawn from the water is determined by the population density of reef-building organisms, the type of light, and other biological, physical and chemical conditions, so each aquarium will have different needs in the frequency of Calcium supply. 

Instructions and Guidelines

BeginnersDissolve 2 grams of product for every 75.71 (20 gallons) litres (8 gallons) of aquarium water in 30.28 litres (8 gallons) of fresh water; dose every other day or as required to maintain calcium concentration between 412 and 450 ppm. When used in this way, 800 g of product treats up to 30283 litres (8000 gallons) of water.

ExpertsCreate a supply of solution by dissolving 10 g of Calcion-P in 236 ml of fresh water (preferably purified); each ml of solution will increase the concentration of Calcium (ions [Ca2+]) in 3.785 litres (1 gallon) of water by 2.50. [Example: Each gram of Calcion-P will increase the level of [Ca2+] in 1 gallon (3.785 L) of water by 95 ppm]. If the initial Calcium in the aquarium is below 412 ppm, add the stock solution at a maximum dosage of 10 ml per 75.71 litres (20 gallons) each day until the desired concentration is reached, then dose daily or weekly as needed. Always try to keep Calcium within a range of +/-10 ppm.

To determine the dosing frequency of this product once the desired calcium concentration has been reached, measure the calcium consumption in the aquarium daily by measuring it at the same time each day for a period of 1-2 weeks. To determine the daily dosing (preferable to weekly dosing), estimate the volume of water present in the entire aquarium system (in gallons), divide the drop in Calcium level by 2.50, multiply this number by the volume of water present in the system to obtain the required daily dosage of stock solution (in ml) to maintain a stable Calcium level. 

Attention: Keep out of reach of children. Not suitable for human use.

Guaranteed analyses

Calcium (min - max) 33 - 37% (330,000 - 370,000 ppm)

Ingredients

CCalcium loride (anhydrous)