Liquid Acid Buffer™ is a non-phosphate buffer to lower pH and buffer with Liquid 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. Liquid Acid Buffer™ lowers pH and buffers between 5.0 and 8.0 when used with Liquid Alkaline Buffer™. As Liquid Acid Buffer™ lowers pH it converts carbonate alkalinity into available CO2. Compatible with all Seachem products.