ReeFlowers Strontium is a high- density ionic strontium solution. 1% of the skeletal structure of corals consists of strontium. ReeFlowers Strontium contains a minimum 30.000ppm of strontium in a1 litre bottle. Strontium assists the development of the skeletal structure of corals by transforming ions. This helps to maintain vivid colours and a strong skeleton. Every aquarium has a different strontium consumption level. The average ratio of strontium consumption to calcium consumption is 1%. Before using the product determine the calcium consumption of the aquarium using an appropriate test kit. 1 ml of Strontium solution should be added for each 30 ppm of calcium consumption in 100 litersof water.