Automatic pH buffer and alkalinity or carbonate hardness (KH) adjusting system designed for African cichlids and other rift lake fishes. Also works well for many American cichlids whose native waters have high pH's of above 7.8. Provides a stable pH environment. Dissolves instantly with little or no precipitation. Compatible with and designed for use with A F Cichlid Chemistry and A F Cichlid Rift Lake Trace Elements by Kent Marine. Free of polluting nitrates; phosphates; and organic chemicals. Read the considerations for use section below. First; for initial setup; or for water changes; use A F Cichlid Chemistry by Kent as directed on its label. Then dissolve one teaspoon (6 grams) of A F Cichlid Buffer (this product) in a glass of fresh water. Add directly to tank for each 10-20 gallons (40 to 80 liters) of tank capacity each day until the desired alkalinity is reached.