Seachem Equilibrium is specifically designed to establish the ideal mineral content for a planted aquarium. Equilibrium contains no sodium or chloride which can be detrimental to a planted aquarium at elevated levels. It is 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. Equilibrium contains calcium, magnesium and potassium salts which aid in fish metabolism, but are also highly beneficial to plant growth. Directions:To raise mineral content/general hardness (GH) by 1 meq/L (3dH), add 16g for every 80L when setting up an aquarium or when making water changes (add to new water). For optimum solubility we recommend mixing with 1L 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. Do not use Seachem Equilibrium when replacing evaporated water. This dose is based on DI or RO water for other water, measure hardness (GH) first, then add accordingly. For precise dosing, use the Seachem Digital Spoon Scale. 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). Equilibrium will compact with age, but remains effective. Available Sizes:300g, 600g & 4kg