Enhanced Pro Buffer DKH with Coralline Accelerator raises alkalinity or buffering capacity and works automatically to control pH in any marine aquarium. In addition, when used with any of our calcium additives, it encourages strong coralline algae growth. Each 16-Ounce of Pro Buffer DKH will treat 1,900-gallon or 7,200 litres. A pH of 8.0 to 8.3 and an alkalinity of 2.9 to 4.0 meq/L (8 to 11 DKH) is recommended for reef type aquariums (fish only marine aquariums should maintain 3.5 to 5.5 meq/L or 10 to 14 DKH) and calcium level should be maintained between 400 and 450 ppm, using Kent Turbo Calcium, Concentrated Liquid Calcium, or Kalkwasser Mix. Test calcium and alkalinity and adjust the recommended dose for your particular system. Do not exceed 1/2 ml of this product per gallon per 12 hour period. Daily addition of calcium along with this product will yield optimum results, particularly when trying to accelerate coralline algae growth. If you have trouble maintaining calcium or buffer level, check to see that the salt mix you are using has seawater level of magnesium. To save money and increase dissolvability, some manufacturers of popular newer salts have included only half the level of magnesium necessary in their sea salt mixes, resulting in low calcium solubility and poor buffering. If magnesium is low, use Kent Tech M Magnesium.