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Aquarium CO2 Accessories

  • Aquario Neo CO2 Tiny Curved Diffuser made of acrylic for efficient CO2 diffusion in aquarium setups.
    Aquario Neo CO2 Tiny Curved Diffuser made of acrylic, designed for efficient CO2 diffusion in aquariums.
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    $ 22.99
    $ 22.99 - $ 22.99
    $ 22.99
    $ 16.99
    $ 16.99 - $ 16.99
    $ 16.99

    Aquario Neo CO2 Curved Diffuser - Tiny

    When you are managing a delicate nano tank or micro desktop setup, keeping equipment out of sight is everything. The Aquario Neo CO₂ Curved Tiny ta...

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    $ 22.99
    $ 22.99 - $ 22.99
    $ 22.99
    $ 16.99
    $ 16.99 - $ 16.99
    $ 16.99
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  • Aquario Neo CO2 curved special diffuser for aquarium CO2 injection, compact and efficient for even gas distribution.
    Aquario Neo CO2 curved acrylic diffuser for aquarium, designed for efficient CO2 dispersion in aquatic tanks.
    Save up to 26% Save %
    $ 0.00 - $ 25.19
    $ 0.00 - $ 25.19
    $ 0.00
    $ 16.99 - $ 20.99
    $ 16.99 - $ 20.99
    $ 16.99

    Aquario Neo CO2 Curved Special Diffuser

    The Aquario Neo CO₂ Curved Special series is all about keeping things as clean and minimalist as possible. By taking a factory pre-bent neck and ho...

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    $ 0.00 - $ 25.19
    $ 0.00 - $ 25.19
    $ 0.00
    $ 16.99 - $ 20.99
    $ 16.99 - $ 20.99
    $ 16.99
    Save up to 26% Save %
  • Acrylic Aquario Neo CO2 Curved Original Diffuser for aquarium CO2 injection system, showcasing its curved design.
    Aquario Neo CO2 Curved Original Diffuser made of acrylic, designed for efficient CO2 diffusion in aquariums.
    Save up to 26% Save %
    $ 18.99 - $ 22.99
    $ 18.99 - $ 22.99
    $ 18.99
    $ 14.99 - $ 16.99
    $ 14.99 - $ 16.99
    $ 14.99

    Aquario Neo CO2 Curved Original Diffuser

    The Aquario Neo CO₂ Curved Original series brings a clever twist to the classic Original line. It features a factory-pre-bent neck that hooks clean...

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    $ 18.99 - $ 22.99
    $ 18.99 - $ 22.99
    $ 18.99
    $ 14.99 - $ 16.99
    $ 14.99 - $ 16.99
    $ 14.99
    Save up to 26% Save %
  • Aquario Neo CO2 curved original diffuser for aquarium CO2 injection, with a sleek design and precise dispersion.
    Aquario Neo CO2 Extended Original Diffuser for aquarium CO2 systems, made of acrylic with fine diffusion mesh.
    Save up to 26% Save %
    $ 18.99 - $ 22.99
    $ 18.99 - $ 22.99
    $ 18.99
    $ 14.99 - $ 16.99
    $ 14.99 - $ 16.99
    $ 14.99

    Aquario Neo CO2 Extended Original Diffuser

    If you are running a deeper display tank or a setup with a bit more vertical height, standard short diffusers just won't cut it. The Aquario Neo CO...

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    $ 18.99 - $ 22.99
    $ 18.99 - $ 22.99
    $ 18.99
    $ 14.99 - $ 16.99
    $ 14.99 - $ 16.99
    $ 14.99
    Save up to 26% Save %
  • Aquario Neo CO2 normal special diffuser for aquarium, made of acrylic, enhances CO2 dispersion in aquatic environments.
    Aquario Neo CO2 normal special diffuser for aquarium, acrylic construction, designed to diffuse CO2 efficiently in aquatic tanks.
    Save up to 29% Save %
    $ 0.00 - $ 20.99
    $ 0.00 - $ 20.99
    $ 0.00
    $ 13.50 - $ 15.00
    $ 13.50 - $ 15.00
    $ 13.50

    Aquario Neo CO2 Normal Special Diffuser

    If you already use an external or regulator-mounted bubble counter under your cabinet, you don't need another one hogging space inside your display...

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    $ 0.00 - $ 20.99
    $ 0.00 - $ 20.99
    $ 0.00
    $ 13.50 - $ 15.00
    $ 13.50 - $ 15.00
    $ 13.50
    Save up to 29% Save %
  • Aquario Neo CO2 Extended Special Diffuser for aquarium CO2 systems, made of acrylic with a sleek, extended design
    Aquario Neo CO2 Extended Special Diffuser for aquarium CO2 systems, made of acrylic with fine diffusion features.
    Save up to 37% Save %
    $ 24.49 - $ 28.49
    $ 24.49 - $ 28.49
    $ 24.49
    $ 15.99 - $ 17.99
    $ 15.99 - $ 17.99
    $ 15.99

    Aquario Neo CO2 Extended Special Diffuser

    If you are running a deeper rimless tank or a setup with serious vertical height, getting your gas all the way down to the substrate can mean runni...

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    $ 24.49 - $ 28.49
    $ 24.49 - $ 28.49
    $ 24.49
    $ 15.99 - $ 17.99
    $ 15.99 - $ 17.99
    $ 15.99
    Save up to 37% Save %
  • Aquario Neo CO2 Normal Original Diffuser for aquarium CO2 systems, made of acrylic, ensures efficient gas dispersion.
    Aquario Neo CO2 normal original diffuser for aquarium, made of acrylic, designed to evenly disperse CO2 in aquatic environments
    Save up to 30% Save %
    $ 17.89 - $ 19.99
    $ 17.89 - $ 19.99
    $ 17.89
    $ 12.99 - $ 13.99
    $ 12.99 - $ 13.99
    $ 12.99

    Aquario Neo CO2 Normal Original Diffuser

    If you want tiny bubbles and big plant gains, the Aquario Neo CO₂ Normal Original makes it easy. Its micro‑pore ceramic disc vaporizes CO₂ into a s...

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    $ 17.89 - $ 19.99
    $ 17.89 - $ 19.99
    $ 17.89
    $ 12.99 - $ 13.99
    $ 12.99 - $ 13.99
    $ 12.99
    Save up to 30% Save %
  • Aquario Neo CO2 Extended Tiny Diffuser for aquarium, made of acrylic, disperses CO2 efficiently in aquatic environments.
    Aquario Neo CO2 Extended Tiny Diffuser in clear acrylic for aquarium CO2 distribution.
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    $ 22.99
    $ 22.99 - $ 22.99
    $ 22.99
    $ 16.99
    $ 16.99 - $ 16.99
    $ 16.99

    Aquario Neo CO2 Extended Diffuser - Tiny

    If you are running a deep micro-tank or an ultra-compact rimless nano setup, finding equipment that fits without causing a massive visual distracti...

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    $ 22.99
    $ 22.99 - $ 22.99
    $ 22.99
    $ 16.99
    $ 16.99 - $ 16.99
    $ 16.99
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  • Blue CO2 proof tubing by ZJLNM, flexible and durable for reliable carbon dioxide transfer in aquarium or brewing systems.
    Blue CO2 proof tubing by ZJLNM, flexible and durable for secure CO2 gas transfer in aquarium and industrial setups.
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    $ 0.00 - $ 13.99
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    $ 0.00
    $ 9.99 - $ 12.59
    $ 9.99 - $ 12.59
    $ 9.99

    CO2 Proof Tubing - Blue

    This item qualifies for FREE shipping to the contiguous U.S. Shipping to Alaska or Hawaii? Contact us for a custom shipping quote—we’re here to hel...

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    $ 0.00 - $ 13.99
    $ 0.00 - $ 13.99
    $ 0.00
    $ 9.99 - $ 12.59
    $ 9.99 - $ 12.59
    $ 9.99
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Aquatic plants have two basic requirements: CO₂ and light. A proper CO₂ system is one of the most effective ways to support a thriving planted aquarium, especially if you want lush, vibrant plant growth.

Our premium aquarium CO₂ accessories help maintain stable carbon levels so plants can grow faster, stronger, and with richer color. When CO₂, light, and nutrients fall out of balance, algae can quickly take over; adding CO₂ gives plants the advantage, allowing them to out‑compete algae and develop the full, bushy growth every aquascaper wants.

CO₂ Resources & Setup Guides  

  1. Setting up a CO₂ system can seem intimidating at first, but the fundamentals are far easier than they appear. Begin with How to Add CO₂ to Your Planted Aquarium for a safe, step‑by‑step introduction.
  2. To ensure your system includes every critical component, review the 6 Essential Parts of a Planted CO₂ Setup before assembling your gear.
  3. If you want to understand why CO₂ has such a dramatic impact on plant health, The Mysteries of CO₂ in a Planted Tank Explained offers a clear, accessible breakdown of the underlying science.
  4. For a deeper dive into the equipment itself, our Guide to CO₂ Equipment Needed for a Planted Tank walks through each component and its role in a successful setup.