Coral Reef Research, Inc. (Natureef) Reef Former Powder

If you want to mix Kalkwasser here is the powder to do it. You have your choice of ultra pure reagent grade Calcium hydroxide for the economical technical grade. Use the ultra pure reagent grade or if you want to limit other chemicals going into your tank use the technical grade which may contain some Magnesium. We let it be your choice. In any case, the addition of Calcium hydroxide "Kalkwasser" is beneficial for all calcium depositing animals and coralline algae. Also, it limits phosphate build-up and helps to drag organic junk out of the water.