Ph up will reduce the Acidity of aquarium water always pre-mix this product in a separate container first with some water from your aquarium. recommend doses 1/2 teaspoon with 1 cup of water
Then add to your aquarium in small increments, test the ph after adding a small amount of the pre-mixed Ph-up.
Reducing the acidity should be done over a period of several hours.
Increase the Ph of your aquarium water slowley as fish do not like sudden Ph changes.