Coral Reef Research, Inc. (Natureef) Reef Former Concentrate with Strontium

No powdery mess, no extra Strontium required. Just shake and add a couple of capfuls to a gallon of freshwater and presto you have "KALKWASSER". If you use KALKWASSER this makes it a breeze to prepare. You can use it all. It contains only pure Calcium and Strontium in the proper ratio just like you find in natural ocean water. Each bottle can make more than 30 gallons of KALKWASSER at half saturation. It is available in 16 ounce (473ml) bottles.