Seachem Acid Regulator adjusts pH to the acidic range (4.5-5.5) and softens water by precipitating calcium and magnesium. Seachem Acid Regulator supports the establishment of the optimal environment for all acid acclimated species (e.g. neons and other tetras, etc.). Seachem Acid Regulator contains phosphate buffers and conditioning agents. Safe for all freshwater fish acclimated to acid pH.Use of Seachem Acid RegulatorUse 1 level teaspoon (5 g) for every 40 L daily until intended pH is reached. For precise dosing use the Seachem Digital Spoon Scale. Thereafter, use once a month or with water changes as required to maintain pH. To raise pH, use Seachem Neutral Regulator./br>