ReeFlowers Kalkwasser contains pure calcium hydroxide enriched with magnesium and strontium. It increases calcium magnesium and strontium elements which are crucial for skeleton formation in a balanced ratio. It regulates kH and pH values. Kalkwasser helps to remove inorganic phosphate and heavy metals clarifying the water. Growth rates and feeding potential are increased as is the formation of coralline algae. Prevents problems caused by co2 in aquariums using calcium reactors (pH drop). Add1.4 grams to 1 liter of R/O water or 1 gram in 1 liter of drinking water (1 ml EnrichedKalkwasser =- 0.6 grams). 1 liter of Kalkwasser provides Approx. 1.2dkh and 8ppm calcium increase in 100 liters of water.Avoid adding the solution in an amount more than 1% of tank volume per day and more than 025 % of tank volume (250 ml for 100 lt) for each time of use.