Tetra EasyStrips 6-In-1 aquarium Test Strips, Water Testing (19542)

About this item COMPLETE TESTING: Regularly testing your water levels is critical to the success of your aquarium. 6 DIFFERENT TESTS WITH 1 STRIP: Just one test monitors nitrates, nitrites, water hardness, chlorine, alkalinity and pH levels. VERSATILE: Can be used in both freshwater and saltwater aquariums. CONVENIENT: Just dip into water, wait 60 seconds and read results. USAGE: Use weekly to monitor aquarium water, after water changes or when adding new fish.