Product Information

Aquario NEO CO₂ Diffuser Original (S, M & L) is a premium South Korean acrylic CO₂ diffuser engineered for planted aquariums. Featuring an ultra-fine micro-porous ceramic membrane, it produces an exceptionally fine CO₂ mist for efficient carbon dioxide dissolution, healthier aquatic plant growth, and reduced CO₂ waste. Its crystal-clear acrylic construction offers the elegance of glass with greater durability, making it a favourite among professional aquascapers and Nature Aquarium enthusiasts.

Designed to Disappear. Engineered to Perform.

In a beautifully aquascaped aquarium, every piece of equipment should enhance the display—not distract from it. That philosophy is what has made Aquario Neo one of the world’s most respected aquascaping brands. Designed in South Korea, the Neo CO₂ Diffuser Original Curved combines elegant minimalist styling with precision CO₂ diffusion, allowing aquascapers to achieve professional plant growth while keeping equipment almost invisible inside the aquarium.

Unlike traditional glass diffusers that are fragile and visually intrusive, the Neo Diffuser uses high-clarity acrylic with a graceful curved neck that routes the CO₂ tubing neatly over the aquarium rim. The result is a cleaner installation with fewer visible hoses and a more refined aquascape.

At its heart is Aquario’s precision ceramic membrane, producing an ultra-fine mist of microscopic CO₂ bubbles that remain suspended longer in the water column. This improves CO₂ dissolution, reduces gas loss at the surface, and provides aquatic plants with a more consistent carbon supply for healthier growth.

Whether you’re building an Iwagumi, Nature Aquarium, Dutch layout, or a modern planted aquascape, the Neo Curved Diffuser delivers both performance and beauty.

Why Aquario Neo Is Loved by Aquascapers Worldwide

Aquario Neo has become one of the most respected premium aquascaping brands because its products are designed around three simple ideas:

• Beautiful enough to be seen
• Simple enough to maintain
• Engineered for maximum aquarium performance

Rather than treating aquarium equipment as something to hide, Aquario designs products that become part of the aquascape through clean lines, crystal-clear materials, and minimalist engineering.

This philosophy has made Neo products a favourite among planted aquarium enthusiasts, professional aquascapers, and Nature Aquarium hobbyists around the world.

Why Choose the Aquario NEO CO₂ Diffuser?

• Premium South Korean design
• Ultra-fine micro-porous ceramic diffuser
• Better CO₂ dissolution and reduced gas waste
• Crystal-clear acrylic construction
• Stronger and more durable than glass
• Elegant minimalist appearance
• Easy to clean and maintain
• Suitable for pressurised CO₂ systems
• Ideal for Nature Aquariums and aquascaping
• Compatible with most standard CO₂ tubing

Why Smaller CO₂ Bubbles Matter

The Neo Diffuser’s special ceramic membrane produces an extremely fine CO₂ mist.

Smaller bubbles:

• Stay suspended in the water longer
• Dissolve more efficiently
• Reduce CO₂ wastage
• Improve carbon availability for aquatic plants
• Help maintain more stable CO₂ levels throughout the aquarium

This means healthier plant growth while making better use of every gram of CO₂.

Why Aquario Uses Acrylic Instead of Glass

Many hobbyists assume glass is the premium choice. Aquario deliberately chose high-quality acrylic because it offers several advantages:

• Higher resistance to accidental breakage
• Crystal-clear appearance
• Lightweight construction
• Safer during maintenance
• More durable for long-term use
• Elegant minimalist finish

Something Fishy Recommendation

• Small (S): Nano aquariums, 30–60 cm planted tanks, cube aquariums, up to 100 L.
• Medium (M): Standard 60–90 cm planted aquariums, 100–200 L.
• Large (L): Large aquascapes (120 cm+), high-demand planted aquariums, 200 L and above.

If your aquarium is heavily planted with carpeting plants and high lighting, choosing the larger size within the recommended range can improve CO₂ distribution.

Installation Tips

For the best CO₂ efficiency:

• Position the diffuser in the lower one-third of the aquarium.
• Place it below the filter outlet or lily pipe so the current carries the micro-bubbles across the tank.
• Keep it away from stagnant areas with poor circulation.
• Ensure the ceramic disc is completely submerged.
• Allow the lower chamber to fill with water; it can then serve as a built-in bubble counter.

Ideal For

• Nature Aquariums
• Dutch Aquascapes
• Iwagumi Layouts
• Rimless Aquariums
• High-Tech Planted Tanks
• CO₂-Injected Aquariums
• Stem Plant Aquariums
• Carpet Plant Aquascapes
• Professional Aquascaping

Not Recommended For

• Aquariums without CO₂ injection
• Fish-only aquariums
• Low-tech planted tanks that do not use pressurised CO₂

Expert Tip from Something Fishy

For the highest CO₂ efficiency, install the Neo Diffuser directly beneath your filter outlet or lily pipe so the current carries the micro-bubbles throughout the aquarium before they dissolve. This improves CO₂ distribution and helps maintain more consistent carbon levels across the entire planted layout.

Important Precautions

• Use only with a pressurised CO₂ system. DIY yeast systems often cannot generate enough pressure for the ceramic membrane to produce its signature ultra-fine mist. This is a common point raised by hobbyists.
• Soak the diffuser in clean water for 10–15 minutes before first use to saturate the ceramic membrane and purge trapped air. Otherwise, larger bubbles may appear initially.
• Install the diffuser below the filter outlet so water flow distributes CO₂ evenly across the aquarium.
• Do not force the acrylic body during installation.
• Avoid exposing the diffuser to hot water or direct heat.
• Handle the ceramic disc carefully as it is the precision working surface.
• Always use CO₂-resistant tubing (4/6 mm).
• Install a check valve to prevent aquarium water from siphoning back into the regulator.

Care & Maintenance

Keeping Your Neo Diffuser Performing Like New Over time, algae, mineral deposits and biofilm clog the microscopic ceramic pores. Regular cleaning restores the ultra-fine mist.

Weekly

• Inspect for algae buildup.
• Check suction cups.
• Verify consistent bubble size.

Every 2–4 Weeks

• Remove the diffuser.
• Soak in a 1:1 diluted, unscented household bleach solution for 30–60 minutes (follow bleach safety precautions).
• Rinse thoroughly.
• Soak in clean water with a dechlorinator before returning it to the aquarium.
• Soak in water again for about 10 minutes before restarting to ensure the ceramic is fully saturated.

Signs It Needs Cleaning

• Larger bubbles than normal
• Uneven bubbling across the ceramic
• Reduced CO₂ output
• Higher regulator pressure required
• Visible algae or deposits on the membrane

Common Mistakes – Avoid These Common CO₂ Diffuser Mistakes

• Choosing a diffuser that is too small for the aquarium.
• Installing it in an area with little or no water circulation.
• Using standard airline tubing instead of CO₂
• Forgetting to soak the diffuser before first use.
• Running excessive surface agitation that drives off CO₂.
• Neglecting regular cleaning, leading to clogged ceramic pores.

Compatible With

• CO₂Art
• Chihiros
• Aquario
• ISTA
• GLA
• JBL
• Up Aqua
• Standard 4/6 mm CO₂ tubing
• Dual-stage regulators
• Solenoid regulators
• Bubble counters
• Drop checkers

What’s Included

• Aquario Neo CO₂ Diffuser Original Curved
• 2 × Suction Cups

Expert Installation Tips from Something Fishy

Proper placement has a significant impact on CO₂ efficiency.

For the best results:

• Install the diffuser in the lower one-third of the aquarium.
• Position it directly beneath the filter outlet or lily pipe.
• Allow the water current to carry the micro-bubbles throughout the aquarium.
• Avoid placing the diffuser in dead spots with poor circulation.
• Ensure the ceramic disc remains completely submerged.

This simple positioning method improves CO₂ distribution and helps maintain more consistent carbon levels across the entire planted aquarium.