API pH Proper 7.5 Powder Jar automatically sets and stabilizes the pH level in freshwater aquariums to 7.5 which is perfect for Goldfish, Guppies, Barbs, Swordtails, Platies and Mollies. It also removes toxic compounds from tap water such as chlorine, neutralises chloramines, detoxifies heavy metals, and adds electrolytes, making tap water safe for fish. Use this aquarium treatment when setting up a new aquarium, adjusting pH, or changing water. pH in an aquarium can fluctuate due to fish waste, uneaten food and addition of tap water. It is recommended to test water for pH weekly.

pH is the measure of acidity of water, on a scale ranging from 0 to 14. A pH of 0 is the most acidic, while a pH of 14 is the most alkaline. Water with a pH of 7.0 is considered ""neutral"". Different geographies have different tap water conditions with different pH levels, while fish require a specific pH level to thrive.