Seachems Tanganyika Buffer is a blend of carbonate salts designed to enhance the natural environment of cichlids by increasing hardness, buffer capacity, and pH. It is formulated to maintain a pH of 9.0-9.4. 500 gram/1.1 lbs. Treats 2115 us gallons 1 kilo/2.2 lbs. Treats 4235 us gallons 4 kilo/8.8 lbs. Treats 16,940 us gallons