pH up is a great way to increase the Alkalinity and decrease the acidity of your aquarium or pond. 

Note: Regularly monitor the pH of your water using a pH Test Kit. 

When Making changes to the pH of your water small doses over a number of days that gradually change the pH level will have better results and is much safer for fish and plants than one large dose that dramatically changes the pH balance.

please keep your old pH measuring spoon/scoop as none will be supplied with this item, cheers.