Equilibrium™ is specifically designed to establish the ideal mineral content for the planted aquarium. Equilibrium™ is ideally suited for use with RO (reverse osmosis) or DI (deionized) water or any mineral deficient water. Equilibrium™ raises the essential mineral/electrolyte content (General Hardness) of the water to balance with and promote stability of the carbonate hardness without the introduction of chloride or sodium (both can be detrimental to a planted aquarium at elevated levels). To maintain KH, we recommend Alkaline Buffer™. Equilibrium™ and Alkaline Buffer™ are all that is needed to maintain the ideal mineral/electrolyte balance in the natural planted aquarium. Elemental potassium is present at a concentration of 195,000 ppm. Archaic fertilizer laws force us to list potassium in terms of equivalence to a material that is not present (K2O) rather than the more scientificaly sound method of simple elemental equivalence.. Guaranteed Analysis: Soluble Potassium (as K2O) 23.0%, Calcium (Ca) 8.06%, Magnesium (Mg) 2.41%, Iron (Fe) 0.11%, Manganese (Mn) 0.06%. Derived from: potassium sulfate, calcium sulfate, magnesium sulfate, ferric sulfate, manganese sulfate. DIRECTIONS: To raise mineral content/ general hardness (GH) by 1 meq/L (3 dH), add 16 g (1 tablespoon) for every 80 L (20 gallons*) when setting up a tank or when making water changes (add to new water). Equilibrium™ can be added straight, although for optimum solubility characteristics, we recommend mixing with ~ 1 L (1 qt.) of water (the resulting mixture will have a white opaque appearance). When this mixture is added to the tank it will impart a slight haze that should clear within 15-30 minutes. HINTS: Do not use Equilibrium™ when replacing evaporated water. This dose is based on DI or RO water; for other water, measure hardness (GH) first, then add according to need. Plant preferences vary, but a general guide is about 1-2 meq/L (3-6 dH) or match the existing or target carbonate hardness (KH), which, ideally, is also about 1-2 meq/L (3-6 dKH)