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Superior glass CO2 Drop Checker with the most accurate and reliable 4dKH solution in the marketQuick and easy to setup. Simply fill the drop checker with the provided solution to half full, affix the checker to the glass, check back in one hour later for accurate readingProviding easy to read CO2 level. BLUE Needs more CO2. GREEN Sufficient CO2. YELLOW Danger Too much CO2. Constantly monitoring the CO2 level in the water columnComplete kit for monitoring CO2 contents. Package include 15ml 4dKHPH solution. 1 piece CO2 drop checker, 1 piece suction cup. MORE DETAILS asin B07YCQ77JJ bestsellersrank 14 in Aquarium Test Kits datefirstavailable October 28, 2019 itemmodelnumber CO2Testkit manufacturer FZONE packagedimensions 4.76 x 3.39 x 1.42 inches 2.29 ounces
