- Application: 15 g Discus Minerals to 100 litres of osmosis water or 10 g to 100 litres of mineral-poor water. Discus Minerals is very easily soluble. Dissolve the mineral mixture in a separate container of water and then slowly add to the aquarium. 1 g to 10 litres increases the total hardness by approx. 3∞ GH and the conductivity by approx. 150 μS/cm….
