Acid Regulator adjusts pH to the acidic range (4.5 – 5.5) and softens water by precipitating calcium and magnesium. Acid Regulator supports the establishment of the optimal environment for all acid acclimated species (e.g. neons and other tetras, etc.). For further freshwater environment enhancement, use Fresh Trace to restore the proper level of trace elements required by thriving, healthy freshwater community fish. DIRECTIONS: Use 1 level teaspoon (7 g) for every 40 L (10 gallons*) daily until intended pH is reached. Thereafter, use once a month or with water changes as required to maintain pH. To raise pH, use Neutral Regulator™. To target a particular pH use in combination with Neutral Regulator™ following the chart below. This chart assumes the use of unbuffered water (RO or DI). If water is already buffered use the chart as a starting guide. Use Prime™ to dechlorinate tap water before doing a water change.