Seachem Alkaline Buffer 300g

Alkaline Buffer™ is a non–phosphate buffer to raise pH and alkalinity (KH) and buffer with Acid Buffer™. These buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Alkaline Buffer™ raises pH and buffers between 7.2 and 8.5. It is gentle, safe, and enhances the freshwater environment.

Adjusts pH to 7.2—8.5
Designed for use in planted aquariums
Increases alkalinity
Contains no phosphate

To increase pH, use 1 teaspoon (6 g) for every 80 L (20 US gallons) daily until desired pH is reached (this dose raises alkalinity by about 1 meq/L (2.8 dKH)).