Seachem Acid Buffer is a non-phosphate buffer to lower pH and buffer with Seachem Alkaline Buffer. Both buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Seachem Acid Buffer lowers pH and buffers between 6.0 and 8.0 when used with Seachem Alkaline Buffer. As Seachem Acid Buffer lowers pH it converts carbonate alkalinity (KH) into available CO2.Use of Seachem Acid BufferTo lower pH, use 1/4 teaspoon (2g) for every 80 L daily until desired pH is reached (this dose lowers alkalinity by about 0.2 meq/L (0.6 dKH)). Larger doses may be required in very hard (KH) or alkaline waters. For precise dosing, use the Seachem Digital Spoon Scale.