SR Aquaristik CO2 Drop Checker with 4 DKH Solution

Includes two position suction cup Comes complete with 4dKH drop checker solution Modern minimalistic design SR Aquaristik drop checker CO2 monitoring kit comes complete with drop checker, 4 DKH solution and two position suction cup. Quality glass construction and minimalistic design makes this drop checker easily integrated into almost any aquarium. - Blue Color - Indicates low levels of CO2 in the aquarium, slowly increase the level of CO2 - Green Color - Indicates optimum levels of CO2 in the aquarium, no action required - Yellow Color - Indicates a high level of CO2 in the aquarium, reduce CO2 levels immediately