Kalkwasser Calcium hydroxide supplement for coral 225g

Phosphate free calcium supplement. When added to a coral reef aquarium, Aqua-Pics Kalkwasser adds vital calcium for the structural growth of corals and invertebrates.  Kalkwasser also helps to raise alkalinity, contributing to pH stability in reef aquariums.  Unlike many other brands, this product is finely ground to maximise solubility.

Directions: Keep adding powder to 2 litres of fresh water until no more can be dissolved. Then, over a few hours, add this solution very slowly to the aquarium, preferably using a drip system into a moving current.