Kent Marine Liquid Calcium Reactor provides the same results as costly calcium reactor systems without the investment. It will raise aquarium concentrations of calcium, magnesium, strontium, trace minerals, and carbonates (alkalinity/buffering capacity). Chloride, phosphate, nitrate, and gluconate free! Add 5-10ml (1-2 tsp) per 55 gallons of aquarium capacity directly to an area of high water flow each day until target calcium level and alkalinity are achieved. It is recommended that Liquid Calcium Reactor be added to the system at night, in order to counter the natural tendency for pH to decrease during this time. When added at a rate of 1ml per gallon of purified water, Liquid Calcium Reactor will increase the concentration of calcium by 33ppm and carbonates by 51ppm.