Aquarium Fish Tank Carbon Dioxide CO2 Monitor Ball Checker Tester PH Indicator

Features Made of acrylic material transparent outlook Easy observation keep abreast of the situation anytime Invisible groove design convenient to open the top cover Specification Material AcrylicSuitable For Long term CO2 monitoringSize of Checker Dia x H 25x37mm 0 98x1 46 appr How to Use1 Will test agent about 15 or according to the actual amout drops into the monitor need not to add water 2 Change again every 30 days airtight preservation at room temperature Warm Tips Simply add couple drops of test solution and water into the checker Stick the checker on the edge of the aquarium Ensure water level cover the opening of the checker Package includeds 1 x Ball Checker1 x pH Indicator SetDetails pictures