Equilibrium, 4 kg / 8.8 lbs Restores And Maintains Mineral Balance And General Hardness (G) Specifically Designed To Establish The Ideal Mineral Content For The Planted Aquarium Contains no sodium or chloride which can be detrimental to a planted aquarium at elevated levels Ideally Suited For Use With Reverse Osmosis (Ro) Water Or Any Mineral Deficient Water 300G Treats 380 Us Gallons