A reagent kit for examining the base of water quality, the pH level. You can check the water quality by using this kit with or without Drop Checker.

Including a pH color sample card and a measuring cup.

* For Drop Checker - In case the reagent turns yellow from the beginning, due to the low pH value in the aquarium, the reagent color does not change even after adding further CO₂. In such a case, please make a water change for raising pH level, and make sure the reagent turns blue or green before resetting Drop Checker in the aquarium.