For Sale UK

Co2 diffuser

4

Co2 diffuser for sale on Ireland's largest auction and classifieds sites

Home / Fish & Aquarium / Co2 diffuser refurbished & used for sale | For Sale UK
1xaquarium co2 diffuser - co2, fish

1xaquarium co2 diffuser - co2, fish

£5.79 · Buy It Now

» View details on eBay #sponsored
Ista waterplant co2 - waterplant,

Ista waterplant co2 - waterplant,

£16.99 · Buy It Now

» View details on eBay #sponsored
Ista replacement co2 - ista,

Ista replacement co2 - ista,

£5.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - 1/2x,

Aquarium co2 diffuser - 1/2x,

£20.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - co2,

Aquarium co2 diffuser - co2,

£7.71 · Buy It Now

» View details on eBay #sponsored
120pcs tablets form co2 tablet - form,

120pcs tablets form co2 tablet - form,

£8.71 · Buy It Now

» View details on eBay #sponsored
Fish tank aquarium - fish,

Fish tank aquarium - fish,

£7.07 · Buy It Now

» View details on eBay #sponsored
Practical fish tank plastic - fish,

Practical fish tank plastic - fish,

£8.70 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser fish - aquarium,

Aquarium co2 diffuser fish - aquarium,

£3.99 · Buy It Now

» View details on eBay #sponsored
Ista waterplant co2 diffuser - ista,

Ista waterplant co2 diffuser - ista,

£15.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium, fish

Aquarium co2 diffuser - aquarium, fish

£5.09 · Buy It Now

» View details on eBay #sponsored
Ista corner co2 diffuser - ista,

Ista corner co2 diffuser - ista,

£6.99 · Buy It Now

» View details on eBay #sponsored
Legend co2onnect acrylic co2 - co2onnect,

Legend co2onnect acrylic co2 - co2onnect,

£13.99 · Buy It Now

» View details on eBay #sponsored
Bazooka co2 atomizer - bazooka,

Bazooka co2 atomizer - bazooka,

£8.66 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium,

Aquarium co2 diffuser - aquarium,

£12.00 · Buy It Now

» View details on eBay #sponsored
Ista glass co2 - ista,

Ista glass co2 - ista,

£29.99 · Buy It Now

» View details on eBay #sponsored
Ista co2 diffuser 1 - ista, with

Ista co2 diffuser 1 - ista, with

£5.49 · Buy It Now

» View details on eBay #sponsored
Acrylic aquarium co2 diffuser - aquarium,

Acrylic aquarium co2 diffuser - aquarium,

£7.21 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium, fish

Aquarium co2 diffuser - aquarium, fish

£4.69 · Buy It Now

» View details on eBay #sponsored
Ista co2 ceramic diffuser - diffuser, for

Ista co2 ceramic diffuser - diffuser, for

£5.49 · Buy It Now

» View details on eBay #sponsored
Acrylic aquarium co2 - acrylic, diffuser

Acrylic aquarium co2 - acrylic, diffuser

£6.88 · Buy It Now

» View details on eBay #sponsored
Tropica co2 diffuser - tropica,

Tropica co2 diffuser - tropica,

£12.60 · Buy It Now

» View details on eBay #sponsored
Fish tank aquarium - tank,

Fish tank aquarium - tank,

£5.97 · Buy It Now

» View details on eBay #sponsored
Co2 art inline - co2,

Co2 art inline - co2,

£10.80 · Buy It Now

» View details on eBay #sponsored
Ziss co2 generator - co2,

Ziss co2 generator - co2,

£7.70 · Buy It Now

» View details on eBay #sponsored
2025 new stainless - 2025,

2025 new stainless - 2025,

£14.95 · Buy It Now

» View details on eBay #sponsored
High transparent co2 diffuser - high,

High transparent co2 diffuser - high,

£6.45 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - co2, high

Aquarium co2 diffuser - co2, high

£7.51 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium,

Aquarium co2 diffuser - aquarium,

£12.89 · Buy It Now

» View details on eBay #sponsored
Finest filters mini ceramic - finest-filters,

Finest filters mini ceramic - finest-filters,

£9.99 · Buy It Now

» View details on eBay #sponsored
Hydroponics co2 invaders 100 - invaders,

Hydroponics co2 invaders 100 - invaders,

£11.99 · Buy It Now

» View details on eBay #sponsored
2pcs aquarium co2 diffuser - aquarium,

2pcs aquarium co2 diffuser - aquarium,

£13.57 · Buy It Now

» View details on eBay #sponsored
Glass co2 diffuser length - glass,

Glass co2 diffuser length - glass,

£8.57 · Buy It Now

» View details on eBay #sponsored
Glass co2 diffuser aquarium - glass,

Glass co2 diffuser aquarium - glass,

£6.95 · Buy It Now

» View details on eBay #sponsored
Bazooka atomizer aquarium co2 - bazooka,

Bazooka atomizer aquarium co2 - bazooka,

£24.99 · Buy It Now

» View details on eBay #sponsored
Ista co2 basic diffuser - basic, set

Ista co2 basic diffuser - basic, set

£16.49 · Buy It Now

» View details on eBay #sponsored
Ista replacement ceramic disc - replacement,

Ista replacement ceramic disc - replacement,

£6.19 · Buy It Now

» View details on eBay #sponsored
Inline co2 diffuser mount - inline,

Inline co2 diffuser mount - inline,

£9.20 · Buy It Now

» View details on eBay #sponsored
Qanvee co2 diffuser atomizer - diffuser,

Qanvee co2 diffuser atomizer - diffuser,

£34.65 · Buy It Now

» View details on eBay #sponsored
Bazooka co2 atomizer micro - bazooka,

Bazooka co2 atomizer micro - bazooka,

£8.61 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser replacement for - co2,

Co2 diffuser replacement for - co2,

£12.95 · Buy It Now

» View details on eBay #sponsored
Tropica co2 diffuser - tropica,

Tropica co2 diffuser - tropica,

£12.45 · Buy It Now

» View details on eBay #sponsored
Fish tank plastic - plastic, co2

Fish tank plastic - plastic, co2

£8.27 · Buy It Now

» View details on eBay #sponsored
Jbl proflora aquarium - proflora,

Jbl proflora aquarium - proflora,

£8.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - 1/2x,

Aquarium co2 diffuser - 1/2x,

£5.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium,

Aquarium co2 diffuser - aquarium,

£21.50 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser for aquariums - diffuser,

Co2 diffuser for aquariums - diffuser,

£5.45 · Buy It Now

» View details on eBay #sponsored
Nano co2 diffuser large for - co2,

Nano co2 diffuser large for - co2,

£9.99 · Buy It Now

» View details on eBay #sponsored
Co2 diffusers aquarium fish - co2,

Co2 diffusers aquarium fish - co2,

£4.85 · Buy It Now

» View details on eBay #sponsored
Fish tank carbon dioxide - fish,

Fish tank carbon dioxide - fish,

£14.47 · Buy It Now

» View details on eBay #sponsored
Legend flux line atomizer - flux,

Legend flux line atomizer - flux,

£31.99 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - co2,

Aquarium co2 diffuser - co2,

£13.58 · Buy It Now

» View details on eBay #sponsored
Dennerle plants aquarium glass - plants,

Dennerle plants aquarium glass - plants,

£11.99 · Buy It Now

» View details on eBay #sponsored
Ista co2 diffuser replacement - co2,

Ista co2 diffuser replacement - co2,

£6.99 · Buy It Now

» View details on eBay #sponsored
Jbl proflora co2 taifun spiral - taifun,

Jbl proflora co2 taifun spiral - taifun,

£12.79 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser aquarium air - co2,

Co2 diffuser aquarium air - co2,

£8.20 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser fish tank - fish,

Co2 diffuser fish tank - fish,

£6.65 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser high - aquarium,

Aquarium co2 diffuser high - aquarium,

£8.26 · Buy It Now

» View details on eBay #sponsored
10pcs aquarium tank plant co2 - 10pcs,

10pcs aquarium tank plant co2 - 10pcs,

£9.43 · Buy It Now

» View details on eBay #sponsored
Petal spiral spiro co2 - spiral,

Petal spiral spiro co2 - spiral,

£14.99 · Buy It Now

» View details on eBay #sponsored
Aquarium check valve regulator - check, valve-regulator

Aquarium check valve regulator - check, valve-regulator

£7.55 · Buy It Now

» View details on eBay #sponsored
Legend rhapsody co2 glass - legend,

Legend rhapsody co2 glass - legend,

£10.99 · Buy It Now

» View details on eBay #sponsored
Jbl proflora co2 taifun - jbl,

Jbl proflora co2 taifun - jbl,

£11.59 · Buy It Now

» View details on eBay #sponsored
Co2 art inline - art,

Co2 art inline - art,

£18.29 · Buy It Now

» View details on eBay #sponsored
Finest filters external - co₂,

Finest filters external - co₂,

£23.99 · Buy It Now

» View details on eBay #sponsored
Replacement disc for - disc,

Replacement disc for - disc,

£5.89 · Buy It Now

» View details on eBay #sponsored
Acrylic fish tank diffuser - fish,

Acrylic fish tank diffuser - fish,

£6.81 · Buy It Now

» View details on eBay #sponsored
Jbl proflora aquarium fish - proflora,

Jbl proflora aquarium fish - proflora,

£27.19 · Buy It Now

» View details on eBay #sponsored
2cm 3cm co2 diffuser - co2,

2cm 3cm co2 diffuser - co2,

£10.39 · Buy It Now

» View details on eBay #sponsored
10pcs round aquarium co2 - round,

10pcs round aquarium co2 - round,

£13.46 · Buy It Now

» View details on eBay #sponsored
Zrdr aquarium co2 diffuser - co2,

Zrdr aquarium co2 diffuser - co2,

£12.99 · Buy It Now

» View details on eBay #sponsored
Easy carbon dioxide diffuser - carbon,

Easy carbon dioxide diffuser - carbon,

£13.89 · Buy It Now

» View details on eBay #sponsored
Inline atomizer co2 - atomizer,

Inline atomizer co2 - atomizer,

£37.99 · Buy It Now

» View details on eBay #sponsored
Acrylic aquarium fish - acrylic, tank

Acrylic aquarium fish - acrylic, tank

£12.50 · Buy It Now

» View details on eBay #sponsored
4pc aquarium co2 diffuser - co2,

4pc aquarium co2 diffuser - co2,

£5.99 · Buy It Now

» View details on eBay #sponsored
Aquarium 1 co2 - 4,

Aquarium 1 co2 - 4,

£9.55 · Buy It Now

» View details on eBay #sponsored
Co2 art inline - art,

Co2 art inline - art,

£26.70 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser shape - u, carbon

Co2 diffuser shape - u, carbon

£8.60 · Buy It Now

» View details on eBay #sponsored
Bazooka atomizer aquarium co2 - bazooka,

Bazooka atomizer aquarium co2 - bazooka,

£22.99 · Buy It Now

» View details on eBay #sponsored
Small co2 diffuser - co2, bubble

Small co2 diffuser - co2, bubble

£7.48 · Buy It Now

» View details on eBay #sponsored
Co2art bazooka flux small - small, co2

Co2art bazooka flux small - small, co2

£16.15 · Buy It Now

» View details on eBay #sponsored
Legend co2onnect tiny - legend, acrylic

Legend co2onnect tiny - legend, acrylic

£13.99 · Buy It Now

» View details on eBay #sponsored
Ziss 200 aquarium - aquarium, co2

Ziss 200 aquarium - aquarium, co2

£7.99 · Buy It Now

» View details on eBay #sponsored
Seachem glass slanted co2 - seachem,

Seachem glass slanted co2 - seachem,

£20.19 · Buy It Now

» View details on eBay #sponsored
Reactor co2 diffuser - reactor,

Reactor co2 diffuser - reactor,

£13.99 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser 4pcs - 4pcs, kit

Co2 diffuser 4pcs - 4pcs, kit

£7.81 · Buy It Now

» View details on eBay #sponsored
Flat glass pollen co2 - glass,

Flat glass pollen co2 - glass,

£10.99 · Buy It Now

» View details on eBay #sponsored
24mm aluminum alloy aquarium - alloy,

24mm aluminum alloy aquarium - alloy,

£7.19 · Buy It Now

» View details on eBay #sponsored
2pcs aquarium co2 diffuser - 2pcs,

2pcs aquarium co2 diffuser - 2pcs,

£13.79 · Buy It Now

» View details on eBay #sponsored
Seachem glass spiral bubble - spiral,

Seachem glass spiral bubble - spiral,

£20.19 · Buy It Now

» View details on eBay #sponsored
Jbl proflora co2 taifun glass - jbl,

Jbl proflora co2 taifun glass - jbl,

£13.19 · Buy It Now

» View details on eBay #sponsored
Aquarium co2 diffuser - aquarium,

Aquarium co2 diffuser - aquarium,

£7.76 · Buy It Now

» View details on eBay #sponsored
Tube bubble atomizer - tube,

Tube bubble atomizer - tube,

£8.42 · Buy It Now

» View details on eBay #sponsored
Fish tank aquarium plant co2 - fish,

Fish tank aquarium plant co2 - fish,

£8.70 · Buy It Now

» View details on eBay #sponsored
Co2 diffuser bubble atomizer - bubble,

Co2 diffuser bubble atomizer - bubble,

£8.12 · Buy It Now

» View details on eBay #sponsored

Looking for more co2 diffuser?

Search eBay live — fresh results filtered for the best value, updated every hour.

🔍 Search live deals
📊95 listings · from £3.99 · avg £12.02
⚠️ These listings were last updated more than 13 days ago. Search for fresh listings

Browse 95 co2 diffuser listings currently in our index. Prices range from £3.99 to £37.99, with an average of £12.02. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about co2 diffuser →

Try this: cold water fish tanks | column fish tank | complete fish tanks | coral frags | coral tank | corner aquarium tanks | curved fish tank | custom aquarium stands | custom aquariums | deltec protein skimmer

Shop by budget

< £25 £25 – £50 £50 – £100 £100 – £200 £200 – £500 > £500

Everything you need to know about co2 diffuser

Whether you are looking for a brand-new or second-hand co2 diffuser, eBay offers one of the largest selections available online. With 95 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £3.99, while premium listings can reach £37.99 — giving you a wide budget spread to work with. The average price of £12.02 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.

🔍 co2 diffuser Search live on eBay