Cal Aqua Labs Double Check CO2 Checker for Aquariums Catnip Large: 26

Large:       26

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5–1 cm (Reef Reactor™ Lg is 1 - 3 cm)

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Cal Aqua Labs Double Check CO2 Checker for Aquariums Catnip Large: 26The CalAquaLabs Double Check CO2 Checker for Aquariums is the only all glass dual compartment CO2 checker that allows you to compare the CO2 level in your aquarium to a standard reference. The CO2 indicator solution is kept in the top chamber, while the CO2 reference solution is kept in the bottom chamber. The color of the reference solution corresponds to 30 ppm of CO2, a level widely accepted for good plant growth in most aquariums. It's a one of a