Complete CO2 kit

As mentioned earlier, this CO2 kit includes everything you need to start adding CO2 to your tank right away. The complete set includes the following products as standard:

• Safe, reliable CO2 pressure regulator with stability system to avoid end-of-tank-dumps
• Additional safety valve against overpressure built into the pressure regulator
• An extremely precise needle valve with connection for direct mounting of a bubble counter
• 12V CO2 solenoid valve with LED lamp: whisper quiet and gets less hot than other models
• A 500gr aquarium CO2 bottle that can be filled at any local aquarium shop
• 2 meters of CO2 hose that can handle the high working pressure of the pressure regulator
• An industrial check valve to stop the water, equipped with “quick connect”
• A Pro Atomizer with built-in bubble counter that creates CO2 bubbles (without additional membrane)
• 1x free sealing ring (pre-assembled) for a leak-free connection between your bottle and pressure reducer

In short, everything you need to supply your tank with CO2 and improve the growth rate and quality of your plants. Especially if you combine your complete CO2 set with my All-in-One aquarium fertilizer.

Moreover, as proof of good quality, you also get a 3-year warranty on the pressure regulator itself.

Optionally, you can also expand or customize your set with the following products:

• The PlantedBox Pro diffuser with bubble counter instead of the atomizer
• A 2kg CO2 bottle instead of a 500gr aquarium CO2 bottle
• An additional CO2 tester kit to easily check how much CO2 you’re adding

• If you like to have a diffuser in the aquarium, to keep an eye on the diffusion of CO2
• If you have an internal filter or you prefer the nice design of the diffuser, choose the diffuser

Yes, the pressure regulator in this CO2 kit works fine with pH controllers. Only the Milwaukee MC122 will not work as that controller is not compatible with 12V solenoid valves.

Whether you’re aiming for a fully automated planted aquarium setup or prefer a semi-automated approach, this CO2 kit is designed with versatility in mind. The included solenoid valve can easily be integrated with most pH controllers, allowing you to automate CO2 injection based on your tank’s specific needs. This means you can maintain stable CO2 levels and keep your plants thriving—without constant manual adjustments.

Depending on your preferred level of automation, you can pair the kit with a standalone pH monitor for semi-automated dosing, or connect it to a compatible pH and CO2 controller for a truly hands-off experience. All essential components—regulator, solenoid, tubing, and bubble counter—are included to ensure seamless integration, so you can set up your system as simply or as elaborately as you like.

The solenoid valve on the pressure regulator uses a type C plug for use within EU countries. Can be used on 220V sockets.

Sure! If a component breaks down within the warranty period, I will ship you a replacement part for free or you can send it to me for repair.

Want to upgrade your CO2 kit? You can purchase most components directly on the website. If not directly available, just send me an e-mail and I’ll check what I can do!

So whether you’re looking to perfect your CO2 kit or just need a single part, you’re never locked into buying an entirely new setup.

This aquarium CO2 kit is already complete, you can start immediately with injecting CO2 into your aquarium. However, some products that I recommend pairing with your purchase are:

• Drop checker kit, super useful to measure CO2
• Leak detector, works great if you think there’s a leak somewhere
• Washers for CO2 regulator, I recommend replacing these regularly

I also recommend purchasing a good aquarium fertilizer at the same time, in order to skip on shipping charges.

There are several types of CO2 systems designed to suit different aquarium setups and experience levels. Most aquarists, however, opt for pressurized CO2 kits, which typically come with everything you need: CO2 cylinders, regulators, solenoid valves, bubble counters, diffusers, and flexible tubing.

If you’re looking for a complete CO2 setup at an excellent price, the PlantedBox kit is a great choice!

Need to replace just one part of your aquarium CO2 setup? Many components from my kit are also available individually. Just send me an e-mail if you have questions.