Kent Marine Kalkwasser Mix Reef Type Marine Aquarium Supplement, 7.9-oz jar

Mix 1/8 to 2 teaspoons maximum per gallon of fresh water (preferably reverse osmosis or deionized water) in clean, separate container. Shake / stir mixture vigorously. Let stand for several hours until visible layers appear. Layers should appear as follows (top to bottom): white crust on top, a clear fluid, a milky white fluid and a white precipitate at the bottom. Skim the upper crust layer off and discard. Draw off the clear liquid layer (this is the fluid you want) without disturbing the layers below. This clear layer should be added to the aquarium system very slowly. It is recommended to use a drip system as dosing should be on a continual basis and at a steady rate to replace amount of water lost to evaporation. The Kent Marine AquaDose is the ideal drip dosing system. The bottom two milky white layers should be discarded as well.