Determine the pH of aquarium water with an API pH Test Kit.
To raise pH, add ½ teaspoon (2.5 ml) for each 95L of aquarium water
For larger aquariums, add 1 teaspoon (5 ml) for each 180L of aquarium water
Take another pH reading before adding another dose of pH Up
Some fish may be sensitive to pH adjustments greater than 0.2 in a 24 hour period, so changes of this magnitude should be done with extreme care