API PH DOWN, 1.25 OZ

API® pH DOWN pH adjuster lowers the pH to make freshwater aquariums more acidic for fish and plants when levels get too high. pH is a measure of acidic or alkaline conditions in the water, where a value of 7.0 corresponds to a neutral pH, and pH values ​​are considered to be about 7.0 is alkaline, and pH values ​​less than 7.0 are considered acidic.