To lower pH, use 1/4 teaspoon (2g) for every 80 L (20 US gallons) daily until the desired pH is reached. This dose decreases alkalinity by about 0.2 meq/L (0.6 dKH). Larger doses may be required in very hard (KH) or alkaline waters.

For precise dosing, use the Seachem Digital Spoon Scale.

To adjust pH gradually or if the water is soft or not well-buffered, use Acid Buffer with Alkaline Buffer.