Great For Planted and Livebearer Aquariums Restores GH in Mineral Deficient Water Does Not Contain Sodium Chloride/Salt Equilibrium is a mineral supplement designed to have the ideal mineral balance for the aquarium. It is best used for reverse osmosis water or any water lacking minerals. Water with little dissolved mineral content (low GH) is subject to pH swings which can harm fish and plants. Using Equilibrium to raise the mineral content in your aquarium will ensure your pH remains more constant. Excellent for planted tanks or livebearer aquariums. Test the hardness of your water with the Aquarium Co-Op Multi-Test Strips. To raise mineral content/general hardness (GH) by 3 degrees hardness, add 16 g (1 tablespoon) for every 80 L (20 US gallons) when setting up an aquarium or when making water changes. For optimum solubility Seachem recommends mixing with 1 L (1 qt.) of water (the resulting mixture will have a white opaque appearance). When this mixture is added to the aquarium it will impart a slight haze that should clear within 15–30 minutes. Plant preferences vary, but a general guide is about 3–6 dH (degrees hardness).