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Aquarium CO2 Accessories

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Aquario Neo Mixer CO2 device for aquarium, featuring sleek design and adjustable controls for precise CO2 regulation.
Aquario Neo CO2 mixer with brass fittings and transparent body, used for precise CO2 regulation in aquariums.
$ 28.99 - $ 28.99
$ 28.99
$ 28.99 - $ 28.99
$ 28.99

Aquario Neo Mixer

Product Overview The Aquario Neo Mixer is an inline CO2 injection attachment designed to clip directly onto the outlet of your Aquario Neo Flow lil...

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$ 28.99 - $ 28.99
$ 28.99
$ 28.99 - $ 28.99
$ 28.99
Base Holder - Disposable CO2 Cartridge CO2 - Buce Plant
Base Holder - Disposable CO2 Cartridge CO2 - Buce Plant
$ 5.99 - $ 5.99
$ 5.99
$ 5.99 - $ 5.99
$ 5.99

Base Holder - Disposable CO2 Cartridge

One wrong move during maintenance and your cartridge is tipping, pulling on your airline tubing, or putting stress on your regulator threads. The D...

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$ 5.99 - $ 5.99
$ 5.99
$ 5.99 - $ 5.99
$ 5.99
UNS CO2 Paintball Cylinder - 24 Oz. CO2 - Buce Plant
UNS CO2 Paintball Cylinder - 24 Oz. CO2 - Buce Plant
$ 69.99 - $ 69.99
$ 69.99
$ 69.99 - $ 69.99
$ 69.99

UNS CO2 Paintball Cylinder - 24 Oz.

Product Overview The UNS CO₂ Paintball Cylinder (24 Oz.) offers the perfect middle ground for hobbyists managing a beautiful nano aquarium or compa...

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$ 69.99 - $ 69.99
$ 69.99
$ 69.99 - $ 69.99
$ 69.99
Aquario Neo CO2 Normal Diffuser - Tiny CO2 - Buce Plant
Aquario Neo CO2 Normal Diffuser - Tiny CO2 - Buce Plant
$ 17.89 - $ 17.89
$ 17.89
$ 17.89 - $ 17.89
$ 17.89

Aquario Neo CO2 Normal Diffuser - Tiny

When you’re high‑tech aquascaping a nano or desktop cube, every inch counts. Made from crystal‑clear, shatterproof acrylic, the Aquario Neo CO₂ Nor...

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$ 17.89 - $ 17.89
$ 17.89
$ 17.89 - $ 17.89
$ 17.89
Aquario Neo CO2 Extended Diffuser - Tiny CO2 - Buce Plant
Aquario Neo CO2 Extended Diffuser - Tiny CO2 - Buce Plant
Save 26% Save %
$ 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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Aquario Neo P-Clip accessory for aquarium setup, showing a black plastic clip used for securing cables or tubing.
Aquario Neo P-Clip accessory for aquarium setup, showing a black plastic clip used to secure tubing or cables.
$ 9.99 - $ 9.99
$ 9.99
$ 9.99 - $ 9.99
$ 9.99

Aquario Neo P-Clip

The Aquario Neo P-Clip replaces standard flexible loops with a rigid, ultra-clear acrylic hook assembly. It hangs discreetly over your aquarium gla...

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$ 9.99 - $ 9.99
$ 9.99
$ 9.99 - $ 9.99
$ 9.99
Aquario Neo U-Clips accessories for aquarium setup, shown in the image with multiple U-shaped clips for securing equipment.
Aquario Neo U-Clips accessories for aquarium setup, featuring durable U-shaped clips by Aquario.
$ 6.99 - $ 6.99
$ 6.99
$ 6.99 - $ 6.99
$ 6.99

Aquario Neo U-Clips

Running standard flexible tubing over a sharp aquarium glass edge is an open invitation for kinks and pinches. Over time, that subtle bend at the r...

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$ 6.99 - $ 6.99
$ 6.99
$ 6.99 - $ 6.99
$ 6.99
Aquario Neo CO2 Tiny Curved Diffuser made of acrylic for efficient CO2 diffusion in aquariums.
Aquario Neo CO2 Tiny Curved Diffuser made of acrylic for efficient CO2 dispersion in aquariums.
Save 26% Save %
$ 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
Save 26% Save %
Aquario Neo CO2 Curved Special Diffuser CO2 - Buce Plant
Aquario Neo CO2 Curved Special Diffuser CO2 - Buce Plant
Save up to 26% Save %
$ 0.00 - $ 25.19
$ 0.00 - $ 25.19
$ 0.00
$ 16.99 - $ 23.99
$ 16.99 - $ 23.99
$ 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 - $ 23.99
$ 16.99 - $ 23.99
$ 16.99
Save up to 26% Save %
Aquario Neo CO2 curved acrylic diffuser for aquarium, designed to efficiently disperse CO2 for healthy aquatic plants.
Aquario Neo CO2 curved diffuser made of acrylic, designed for efficient CO2 dispersion 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 Special Diffuser CO2 - Buce Plant
Aquario Neo CO2 Extended Original Diffuser in 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 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 CO2 - Buce Plant
Aquario Neo CO2 Normal Special Diffuser CO2 - Buce Plant
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
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UNS Pro CO2 manifold block for controlled gas distribution, featuring multiple connectors on a durable metal body.
UNS Pro CO2 Manifold Block for CO2 systems, featuring multiple ports and durable metal construction by UNSCO2.
$ 34.99 - $ 124.99
$ 34.99 - $ 124.99
$ 34.99 - $ 124.99
$ 34.99

UNS Pro CO2 Manifold Block

The UNS Pro CO₂ Manifold Block is an add-on extension designed to clip directly onto your existing UNS Pro Dual Stage Regulator. By stacking these ...

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$ 34.99 - $ 124.99
$ 34.99 - $ 124.99
$ 34.99 - $ 124.99
$ 34.99
Space grey UNS CO2 paintball adapter, compact and durable for quick CO2 cartridge connection in airsoft or paintball setups.
UNS CO2 Paintball Adapter in space grey, compatible with CO2 tanks for paintball guns, featuring a compact, durable design.
$ 12.99 - $ 12.99
$ 12.99
$ 12.99 - $ 12.99
$ 12.99

UNS CO2 Paintball Adapter - Space Grey

Attach your CO2 regulator to a paintball CO2 tank using this adapter! A built-in pressure relief hole is included for increased safety measures whe...

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$ 12.99 - $ 12.99
$ 12.99
$ 12.99 - $ 12.99
$ 12.99
UNS Mini Dual Stage CO2 Regulator for precise control of CO2 flow, featuring gauges and adjustment knobs.
UNS Mini Dual Stage CO2 Regulator showing metal body, gauges, and control knobs for precise CO2 pressure regulation.
$ 157.99 - $ 157.99
$ 157.99
$ 157.99 - $ 157.99
$ 157.99

UNS Mini Dual Stage CO2 Regulator

Product Overview Your regulator is the real control center of your CO₂ system, designed to take 700+ PSI of cylinder pressure and tame it into a sa...

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$ 157.99 - $ 157.99
$ 157.99
$ 157.99 - $ 157.99
$ 157.99
UNS Pro Dual Stage CO2 Regulator with pressure gauges and control knobs for precise CO2 regulation in aquarium or beverage systems.
UNS Pro Dual Stage CO2 Regulator for precise gas control, featuring pressure gauges and durable metal construction.
$ 219.99 - $ 219.99
$ 219.99
$ 219.99 - $ 219.99
$ 219.99

UNS Pro Dual Stage CO2 Regulator

Product Overview When managing high-tech layouts, large displays (20 gallons and above), or splitting gas across a multi-tank setup, you need the u...

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$ 219.99 - $ 219.99
$ 219.99
$ 219.99 - $ 219.99
$ 219.99
UNS Advanced CO2 Check Valve by UNSCO2, showing the metallic valve with inlet and outlet ports for controlling CO2 flow
UNSCO2 CO2 advanced check valve, metallic with inlet and outlet ports, used in gas flow regulation systems
$ 9.99 - $ 9.99
$ 9.99
$ 9.99 - $ 9.99
$ 9.99

UNS Advanced Check Valve

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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$ 9.99 - $ 9.99
$ 9.99
$ 9.99 - $ 9.99
$ 9.99
Acrylic Twinstar CO2 diffuser for aquarium tanks, showcasing the clear, compact device designed for efficient CO2 distribution.
Acrylic Twinstar CO2 diffuser for aquarium, featuring a clear, compact design with fine bubble dispersion for efficient CO2 diffusion.
$ 12.99 - $ 14.99
$ 12.99 - $ 14.99
$ 12.99 - $ 14.99
$ 12.99

Twinstar CO2 Diffuser - Acrylic

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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$ 12.99 - $ 14.99
$ 12.99 - $ 14.99
$ 12.99 - $ 14.99
$ 12.99
Aquario Neo CO2 - DIY CO2 Kit CO2 - Buce Plant
Aquario Neo CO2 refill for DIY CO2 kit, showing the refill bottle designed for aquarium CO2 systems.
$ 11.99 - $ 11.99
$ 11.99
$ 11.99 - $ 11.99
$ 11.99

Aquario Neo CO2 Refill - DIY CO2 Kit

Once your Aquario Neo DIY CO₂ Kit runs its course after 50 to 60 days and the underlying stabilizer gel is completely spent, you don't need to thro...

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$ 11.99 - $ 11.99
$ 11.99
$ 11.99 - $ 11.99
$ 11.99
Aquario Neo CO2 - DIY CO2 Kit CO2 - Buce Plant
Aquario Neo CO2 - DIY CO2 Kit CO2 - Buce Plant
$ 28.99 - $ 28.99
$ 28.99
$ 28.99 - $ 28.99
$ 28.99

Aquario Neo CO2 - DIY CO2 Kit

If you have been wanting to try your hand at high-tech plants but feel completely intimidated by massive gas cylinders, heavy regulators, and confu...

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$ 28.99 - $ 28.99
$ 28.99
$ 28.99 - $ 28.99
$ 28.99
Aquario Neo CO2 Extended Special Diffuser for aquarium CO2 systems, made of acrylic with a sleek design
Aquario Neo CO2 Extended Special Diffuser showing acrylic build and intricate diffuser design for aquarium CO2 system.
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 %
Qanvee CO2 inline atomizer for carbon dioxide inflation, compact and durable for bike tires and cycling applications.
Qanvee CO2 Inline Atomizer for carbon dioxide inflating systems, featuring compact design and durable construction.
$ 10.99 - $ 31.99
$ 10.99 - $ 31.99
$ 10.99 - $ 31.99
$ 10.99

Qanvee CO2 Inline Atomizer

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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$ 10.99 - $ 31.99
$ 10.99 - $ 31.99
$ 10.99 - $ 31.99
$ 10.99
CLSMTC Ultum Nature Systems disposable CO2 cartridge for aquarium or beverage use, small cylindrical container with metal valve
CLS™ Ultum Nature Systems disposable CO2 cartridge for aquarium or gardening use, compact metal cylinder with screw-on top.
$ 15.99 - $ 64.99
$ 15.99 - $ 64.99
$ 15.99 - $ 64.99
$ 15.99

Ultum Nature Systems Disposable CO2 Cartridge

Product Overview The UNS Disposable CO₂ Cartridge is the easiest shortcut to a clean, mess-free carbon dioxide supply for nano aquariums and deskto...

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$ 15.99 - $ 64.99
$ 15.99 - $ 64.99
$ 15.99 - $ 64.99
$ 15.99
ASA CO2 Perma-Seal O-Ring for secure CO2 tank connections, shown in close-up with black rubber material and sealing edges.
ASA CO2 Perma-Seal O-Ring for secure CO2 tank connections, shown in close-up with black rubber material and sealing surface.
$ 7.99 - $ 74.99
$ 7.99 - $ 74.99
$ 7.99 - $ 74.99
$ 7.99

CO2 Perma-Seal O-Ring

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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$ 7.99 - $ 74.99
$ 7.99 - $ 74.99
$ 7.99 - $ 74.99
$ 7.99

Aquarium CO₂ Systems & Accessories

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 easier than they appear. Begin with How to Add CO₂ to Your Planted Aquarium for an 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 an 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.