From The Aquarium Wiki
- Kalkwasser is pure Calcium Hydroxide.
- Take a container and fill it with enough RO/DI water for the Kalk to become soluable and not over saturate the water. A good method is to take a one gallon jug and fill it up 4/5 of the way. Put a half teaspoon in the water. Shake the solution up. Allow the solution to sit and for the non-soluable portions to settle to the bottom. Add the solution to your tank, do not add it fast. Pour it into a high flow area of the tank. This solution can have as high as a 12 PH. No more than two teaspoons of Kalkwasser will desolve in a gallon of RO/DI water.
Things Kalkwasser is used for
- To raise alkalinity and increase calcium. It is also known to cause the precipitation of phosphates.
- Kalkwasser can also be used to kill stuff you don't want by making a paste out of it and smearing it on the pest or making a high concentration liquid out of it and injecting it into the pest.
Where to buy Kalkwasser
Kalkwasser can be purchased at most major fish and marine stores. Many hobbyests have had sucess using pickling lime bought at the grocery store.