Aquarium Carbon Dioxide CO2 Monitor PH Indicator Glass Drop Ball Checker Tester

Description Aquarium Carbon Dioxide CO2 Monitor PH Indicator Glass Drop Ball Checker TesterSpecification Material GlassSize 3cm diameter Suitable For Long term CO2 monitoringHow to use 1 Will test agent about 15 or according to the actual amout drops into the monitor neednot to add water2 Change again every 30 days airtight preservation at room temperature Note 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 includes 1 x Glass ball1 x Test solutionDetails pictures