* Aquarium pH adjuster for setting and stabilizing desired pH levels * Great for new aquariums or maintaining pH of existing aquariums * Available in four pH levels to accommodate popular aquarium styles Aquarium PharmaceuticalsSet and stabilize aquarium pH at levels you desire. API Proper pH aquarium-pH adjuster is perfect for use when setting up new aquariums or maintaining the pH of your existing aquarium. Neutralizes chlorine, detoxifies heavy metals and adds electrolytes to reduce fish stress. Also contains Aloe Vera, a proven natural stress reliever and healing agent of aquarium fish. Note: Proper pH is a phosphate buffer and should not be used with aquarium plants.