Check the listing for details. Brightwell Aquatics Remineraliz-P. Condition: New. Listed at 19.69 USD. * Reconstitutes Reverse Osmosis, Deionized or Distilled Water for freshwater aquarium use. Adds minerals that have been removed by those filtration methods. * Establishes an optimal mineral balance in water that has been purified (e.g. reverse osmosis, deionization, etc.) or is exceedingly-soft (e.g. well water in forested regions) for all freshwater planted and community aquaria, as well as for biotope aquaria housing fishes indigenous to forested and/or riverine habitats. * Creates an ideal ratio of potassium, calcium, and magnesium, elements which are vital to the overall health of fishes, invertebrates, and aquatic plants; contains trace sodium and chloride for proper osmoregulation in plants and fishes. * May be used to establish beneficial water parameters in aquaria filled with purified water, to replenish depleted mineral concentrations in aquaria that rarely receive a water change, and to re-establish