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CO2 Drop Checkers are used for long-term monitoring of the CO2 levels in the aquarium. A CO2 reagent is filled into those CO2 Drop Checkers and will change the color according to the amount of dissolved CO2 in the aquarium water. Green will indicate a proper CO2 value, yellow will indicate to much CO2 and blue will show not enough CO2.
The indicator solution turns green at approx. 20-25 mg/l of CO2.
Producer of innovative high quality Products with special interest in aquascaping, aquatic plants and shrimps. ISTA products offer a wide range of products with a very good value for money.
Everything looks good. Before the first use, I decided to wash it, opened it, and the O-ring was torn. As a result, 10 euros were wasted in the nightstand. (read more)
Everything looks good. Before the first use, I decided to wash it, opened it, and the O-ring was torn. As a result, 10 euros were wasted in the nightstand. Better buy a glass device and a bottle of test liquid.