API® 5-in-1 Test Strips are the quick and easy way to test 5 of the most important aquarium water parameters - acidity (pH), water alkalinity (KH), water hardness (GH), nitrates, and nitrites - in one simple step.

All you need to do is dip one test strip directly into the aquarium and compare the colors on the strip with the included color chart to help prevent hidden water issues that may be harmful to fish.

Each kit includes detailed information on how to interpret the test results and correct unsafe water conditions.

Size: 25 pieces per box