Water in lakes and rivers contains renewable trace minerals that are essential for fish and plants to live and grow. In an aquarium environment, these minerals are depleted over time by fish, plants and carbon filtration. Aqueon Water Renewal replaces these biologically essential minerals, restoring water to its natural state and promoting the health, color, and vigor in fish. Replaces essential trace minerals that are used by fish Promotes health, color and vitality in fish Specially formulated for betta Should be used when setting up a new aquarium using tap water Made in the USA