or monitoring proper dosage of CO2. Depending upon aquatic plants and their growth conditions, the amount of CO2 required changes dramatically. Drop Checker is an original glassware unit, designed to indicate the CO2 amount diluted within the water with color change of the pH reagent inside, in order to understand the proper amount of CO2 supply. You can easily judge the proper CO2 supply by comparing the color of reagent with pH color test card.
pH reagent bottle included
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