Check the listing for details. SEACHEM Acid Regulator 4 KG - Adjust pH. Condition: New. Listed at 70.99 USD. SEACHEM Acid Regulator Listing is for ( 1 ) : SEACHEM Acid Regulator 4 KG 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. 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. (NeutReg:AcidReg-pH) (1 : 1-6.8) (1 : 2-6.4) (1 : 3-6.2) (1 : 4-6.1) (1 : 6-6.0) (1 : 9-5.8) Please feel free to contact me for International and combined auction shipping rates or with any questions or concerns that you may have about my products. Thank you !