"Acid Buffer? is a non?phosphate buffer to lower pH and buffer with
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. Acid Buffer? lowers pH and buffers between
6.0 and 8.0 when used with Alkaline Buffer?. As Acid Buffer? lowers
pH it converts carbonate alkalinity (KH) into available CO2."