Removes calcium, magnesium and soluble heavy metals from aquarium water. Lowers hardness and softens water. Does not add harmful ingredients. Convenient pouch is fully rechargeable. For tanks up to 20 gallons. One pillow.

Contains one (1) API WATER SOFTENER PILLOW Aquarium Canister Filter Filtration Pouch 1-Count Bag

Softens hard water

Reduces general hardness by lowering calcium and magnesium