Aquarium CO2 Indicator Solution 15ml Fish Tank Long-term Monitor CO2 Test PH Liquid For Aquatic Plants Tropical Fish (Used with Drop Checker) Package Including: 1 x Aquarium CO2 Indicator Solution (the drop checker is not included and sold separately) Net Weight: 15ml Height: 7.7cm(3.03 inch) Note: Wait 2 hours to read CO2 levels.
