CO2 tubing

Aquarium CO2 tubing connects the regulator, accessories and diffuser along the gas supply route. Tubing sold for other aquarium uses is not automatically suitable for this purpose. Start by checking that the product is intended for CO2 and that its dimensions match every connection in the planned system.

Plan the tubing route

Measure the path between the components, allowing for the installation method described by their manufacturers. Compare inner and outer diameters carefully: these measurements refer to different parts of the tube and both can matter when choosing fittings. Check whether a listed product is tubing alone or a set containing additional components.

Account for the placement of any check valve, bubble counter or connector before deciding on the required length. A clear route also makes the equipment easier to inspect and maintain. Follow the connection instructions for each accessory, and verify the completed installation as directed. Selecting compatible aquarium CO2 tubing is a small but important part of assembling the full system.