ITEM NAME:2X 80 Strips PH Test Strip Aquarium Pond Water Testing Test Paper Litmus Te Lt.8 - 11 indicates alkalinity. 12 - 14 indicates a very high level of alkalinity. Simply press the testing strip to the object or liquid you are testing. Half second later, take out the paper and using the color chart included, compare the color change of the paper to find out the acidity level of your testing subject.
