Skip to product information
1 of 3
  • Play video


Colombo CO₂ Solenoid


Regular price
Regular price
Sale price
Tax included. Shipping calculated at checkout.
  • Hurry, only 1 item left in stock!

Plants only absorb CO₂ when your lights are on, so there is no point in adding gas at night time. Not only is it wasteful, but carbon dioxide binds to oxygen and you can cause major distress or death in your livestock.

The Colombo CO₂ Solenoid should be used with a domestic timer (just like your lights timer) and automates when your CO₂ comes on and off. I recommend it comes on 1 hour before your lights come on and turn off 1 hour before they go off (this is optimal). By using this solenoid you will not only save a lot of gas, reduce any risk to your fish/shrimp and save you plenty of money (as you won't need to purchase CO₂ bottles as often!).

Colombo have now designed a connector which fits the solenoid and regulator nicely meaning your connection is rock solid and much neater too. We recommend it - see this link.


Shipping info

All our products are in stock, ready to ship (unless otherwise stated). Order before 4pm for same day dispatch (Mon-Fri). Prices start at £4.99 for a Tracked 48 Service (up to 5kgs) and £8.99 for Express Delivery via DPD.

Our Delivery Promise To You

If you choose Express Delivery, we will replace any plants that are damaged due to delays. Express Delivery is a fast, trackable, and reliable option with a one hour delivery window. It also ensures that the plants will arrive in the same condition as when they left our facility. If you choose a different postage option, such as Tracked 24 or Tracked 48, you will not be covered for any damages due to delays and will assume the risk yourself if the plants do not arrive in good condition. Express Delivery includes an insurance policy, which may cost more but provides added peace of mind.

Colombo CO₂ Solenoid Colombo
Colombo CO₂ Solenoid


  • All In Stock

    Everything you see on the site is in stock, ready to ship. No special orders, no waiting around.

  • Fast Dispatch

    Fast shipping. If you order before 4pm Mon-Fri, we'll ship the same day. Whoooosh.

  • Easy Checkout

    You'll find our checkout smooth and silky for a comfortable shopping experiece. Welcome to First Class :)

Customer Reviews

Based on 1 review
Easy to fit but remember to buy a timer first.

I added the Solinoid to an existing CO2 set up. It was easy to fit to the airline near the gas bottle. I fastened it to the tank cabinet to keep it stable. Once tightened onto the airline I plugged in to a timer. It turns on 1 hr before the lights come on/off 30 mins before they turn off. It’s only been running for 2 days, but it will save me 14 hours of CO2 per day more than doubling the life of my gas bottle. Well worth the cost. It is sturdily built and easy to fit. What more could you ask?

We're environmentally friendly

  • 1. Sustainable Packaging

  • 2. Fast Delivery

  • 3. Guarantee

Your plants will be wrapped with recyclable Honey Comb wrap - sounds cool because it is :). It interlocks which means we don't need to use tape either, reducing our impact on the environment.

Not only is delivery fast with DPD Express but it's also green as they offset all the carbon their vehicles produce. Guilt free delivery which we're very proud of...

We guarantee you'll be happy with your order. But if you're not, please contact us so we can resolve. We are 100% here to help and will always do our best to resolve any issues - that's a promise.

Contact Us
sustainable packaging
Contact us