API pH UP Freshwater Aquarium Water pH Raising Solution 118 ml Bottle - Contains one (1) API pH UP Freshwater Aquarium Water pH Raising Solution 118 ml Bottle Raises freshwater aquarium water pH with a phosphate-free formula Does not promote algae growth with pH adjustments and is safe for plants and fish Slowly neutralizes acidic substances that cause low water pH Test water weekly and use to correct pH level in freshwater aquariums.