CO2 Checkers

Maintaining the appropriate CO2 level is critical in a planted aquarium. Too much CO2 may harm your fish, whereas too little CO2 decreases plant growth and allows algae to take over. Cal Aqua Labs' CO2 checkers allow you to monitor the CO2 level inside your aquarium. Handmade from the highest quality borosilicate glass, the CO2 checkers are an elegant addition to your planted aquarium.

  • Clip CO2 Checker

    Cal Aqua Labs

    Clip CO2 Checker

    Most glass CO2 checkers on the market today can only be attached to either the left or the right side of the aquarium, and all the checkers on the market requires that the entire unit be completely submerged INSIDE the tank. This may by inconvenient...

    $35.95
    Add to Cart
  • Clip Nano C02 Checker

    Cal Aqua Labs

    Clip Nano C02 Checker

    Cal Aqua Labs' CLIP"n" is a CLIP that is designed specifically for hanging on the aquarium rim. Features: Perfect for hanging on the rim of nano tanks Can be used with rimless aquariums up to 10 mm glass thickness Solid white background behind bulb...

    $34.95
    Add to Cart
  • Double Check CO2 Checker

    Cal Aqua Labs

    Double Check CO2 Checker

    Cal Aqua Labs' "Double Check" series is the only all-glass dual-compartment CO2 checker that allows the user to accurately compare the CO2 level in your aquarium side-by-side against a standard reference. The top chamber holds the CO2...

    $47.95
    Out of Stock
  • Nano CO2 Checker

    Cal Aqua Labs

    Nano CO2 Checker

    Cal Aqua Labs' Nano is hand-crafted from the highest quality laboratory-grade borosilicate glass. Fast response timeEasy to install and readSupplied with 15ml Indicator Solution (4dKH). No mixing nor preparation required.Perfect for aquariums 1-15...

    $35.95
    Out of Stock
  • Oracle CO2 Checker

    Cal Aqua Labs

    Oracle CO2 Checker

    Cal Aqua Labs' Oracle combines the elegance of a glass CO2 checker with a white background inside the solution chamber for increased contrast and easy reading. Observing the solution color in typical CO2 checkers can sometimes be difficult if placed...

    $42.95
    Out of Stock