API Turtle Water Conditioner effectively removes chlorine and chloramines, and detoxifies heavy metals to make tap water safe for aquatic turtles, aquatic reptiles, and amphibians. It also helps to alleviate irritation of sensitive eyes and skin. Use API Turtle Water Conditioner when setting up a new aquarium or vivarium, or when adding or changing water. 8 fl oz size treats 474 gallons. Convenient dosing cap included!