CO2 Supermarket Reviews 

Recently purchased the Pro Aquarium CO2 System and found it to be excellent value, the detailed instructions given by email made it easy to assemble, the ordering was easy and delivery was very quick. I now have this system up and running on my planted aquarium and very pleased with performance, I would highly recommend this system and CO2 Supermarket.

Excellent customer service. Very quick reply to my question. Quick delivery on ordered item.

Delivery was very fast, and customer service was very helpful when I had an issue with my bubble counter. They even sent a spare seal just in case.

Customer support has been very prompt and detailed in their answers. The product I bought worked as advertised and was simple to use, at a competitive price. I'd recommend them - getting cheaper SodaStream refills now!

Great website especially when to comes to setting your co2 system up, good quality products works great,customer service was fast and efficient I had a problem with delivery mine was delayed by DPD nothing to do with co2 supermarket but they was helpful and responded to emails within minutes so I would certainly recommend

Quality of the product is great, delivery great however, I opted for a non-siphoned donor cylinder wrongly assuming if a particular type was required it would be specified in the description for this product. This only works with a siphoned donor cylinder, don't make the mistake I did.

I went to Co2 supermarket because they were one of the two companies recommended by an independent review which I found on the internet when doing some research before buying a co2 system.
I was a complete beginner in co2, but I found their website was easy to follow and their guides helped me understand how it all worked.
I purchased a full system from them, which made life easier and I was confident that I was dealing with a company who knew their products, and the only real choice I had to make was which kind of gas bottle to use.
As it was, after a little more research, I decided to go with Adam’s gas, which looks to be the most economical over time, and I had a stockist quite close.
The only problem I encountered when setting it up, was a leak where the airline attached to the diffuser , and as it was almost five o’clock on a Friday afternoon, I did not expect to get a reply to the email I sent them, until the Monday, but as it was Martin came back to me almost straight away suggested how to fix it and it worked.
So, very pleased with both price and delivery time, I happened to get mine on a Black Friday deal and it was with me in a couple of days, and the after sales service was very good, so I would be more happy to recommend them.

I was browsing for some refill adapters (~£55 on the 04/12/25) and came back the next day to find the were offering a 15% discount. thinking great I'll grab those bits now on offer.... Only to find the price was now £66. amounting to roughly the same price...
That is some scummy behaviour

Great product, quickly dispatched. And Martin answered all my after sales queries. I ordered the single stage CO2 system which was nice and easy to setup using the guides on the site. The only thing I've added is an additional check valve near the diffuser. Not sure it's necessary, but add peace of mind all the same.

Affordable good quality equipment. Excellent pre and post sales support. Recommended.

The experiencie with CO2 supermarket was great, the problem was with the delivery courrier company that not fufill the promise of delivery on time.

Great communication and super quick delivery. Over all a very solid goid co2 unit. My only niggle was the manifolds. I ordered an extra one to run two tanks and both leaked at the needle valve. Easy fixed with a quick tighten on the nut but something to keep in mind 8f ordering. I would buy again without hesitation as unit working great otherwise

When I purchase from CO2 supermarket I am kept informed by email of the progress of my order and provided with links to instructive videos prior to delivery which is on time, When I needed to resolve an assembly issue I found the on line chat to be excellent. Martin is very responsive, he communicated with me several times during a morning so I could resolve the issue

After being a little apprehensive about setting up a CO2 system, this kit was a dream. The guys are quick to reply with help and advice to any questions.

Well put together, fast delivery, and perfect communication.

Really good company. Very helpful before during and after the sale. Would definitely return to buy again

Very easy to find what I need and very quick dispatch
The staff were very helpful after I needed to correct my mistake with my address
Excellent service

All good, fast delivery (arrived before I expected) & fast knowledgeable response to help me solve a problem, now my bazooka produces the finest bubbles that I've ever seen. I will definitely use co2 supermarket again when the need arises.🤩👍🏻

Well designed and engineered products. Fast delivery. Good supplier.

Their customer service is the best! Martin guided me through the whole process and answered all of my questions with patience and a great knowledge of their products. Definitely recommend them to anyone who is looking for an aquarium CO2 system (and has no clue what to buy!).