Two Little Fishies KH Power is a fast-dissolving dry powdered blend of carbonate, bicarbonate, and borate salts designed to raise alkalinity and achieve a stable pH. After a pH of 8.3 is achieved, further additions of KH Power raise the alkalinity only. Five ml (1 teaspoon) of stock solution added to one gallon of water will increase the alkalinity by 1.25 dKH (0.45 meq/L). 225 grams.