Seachem Acid Buffer
SeaChem Acid Buffer with proprietary powdered bisulfate salts is a non-phosphate buffer to lower pH and counter buffer meant to work with Alkaline Buffer (for pH stability). Both buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Acid Buffer lowers pH and buffers between 5.0 and 8.0 when used with Alkaline Buffer. As Acid Buffer lowers pH it converts KH (carbonate alkalinity) into available CO2 for plants.
SeaChem Acid Buffer may also be used to safely lower pH in marine water.