Co2 Drop Checker (co2 Tester)
-Co2 Tester is designed to indicate the CO2 amount diluted within the water with color change of the reagent inside, in order to understand the proper amount of CO2 supply.
-If used will indicate if CO2 become too high make the aquarium live danger
-Easily judge the proper CO2 supply by the color of reagent with color test card.
