DIY Aquarium CO2 Generator Kit with Pressure Gauge & Diffuser

Aquarium DIY CO2 Generator System Kit — Grow Lush, Thriving Planted Tanks

Give your aquatic plants the carbon dioxide they need to flourish with this complete DIY CO2 Generator System. Designed for planted nano tanks and full-sized aquariums alike, this kit makes it easy and affordable to deliver a steady, pure CO2 supply — no expensive pressurized cylinders required. Simply add citric acid and baking soda to standard 2-litre bottles, connect the pre-wired components, and watch your aquascape come alive.

Why Choose This CO2 System?

• Pre-connected design — components arrive ready to assemble, eliminating guesswork and wrong connections.
• Pure, long-lasting CO2 — consistent gas output that promotes vigorous plant growth and vibrant green colour.
• Adjustable needle valve — fine-tune the bubble rate for precise CO2 delivery to your tank.
• Safety pressure valve (manual + auto) — turn clockwise to raise the release pressure threshold; turn anti-clockwise to lower it, keeping your system safe at all times.
• Acid-particle blocking filter — prevents clogging, protects the tuning valve, and extends the life of the entire system.
• Transparent circulation piping — watch fluid flow at a glance to confirm the system is running correctly.
• Corrosion-resistant multi-tool holder shelf — keeps all components organised and secure.
• Universal fit — compatible with most aquarium and planted tank setups.
• Low cost & eco-friendly — uses everyday household chemicals instead of disposable CO2 cartridges.

What You'll Need to Prepare (Not Included)

• 200 g citric acid powder or white vinegar
• 200 g baking soda powder
• 2 × standard 2-litre soft drink bottles

Package Contents

• 1 × Pro Needle Valve
• 1 × Safety Valve with Pressure Gauge
• 1 × DIY CO2 Generator Main Body
• 1 × English Instruction Manual
• 1.6 m Air Tube
• 1 × Acid Suction Tube (with absorbent ball)
• 1 × Acid Pipe (with tee connector)
• 1 × Magnet
• 2 × Spare Rubber Rings

Specifications

• Battery Required: No
• Suitable For: Nano planted tanks & standard aquariums
• Country of Origin: Made in China

Learn More About Aquatic Plant Care

Healthy CO2 levels are essential for photosynthesis in aquatic plants. For tips on maintaining a balanced planted aquarium ecosystem, visit the U.S. Environmental Protection Agency's resources on aquatic biodiversity.

Frequently Asked Questions

Q: How does the DIY CO2 generator system work in an aquarium?

A: The DIY CO2 generator system works by combining citric acid and baking soda inside two 2-litre bottles (not included). The chemical reaction produces a steady stream of carbon dioxide gas, which travels through the air tube and needle valve into your aquarium CO2 diffuser, dissolving into the water to feed your aquatic plants.

Q: Is this CO2 kit suitable for nano planted tanks?

A: Yes! The aquarium DIY CO2 system uses a universal connector design that fits most tank sizes, including nano planted tanks. The adjustable needle valve allows you to dial in a very low bubble rate ideal for smaller setups.

Q: How do I adjust the CO2 output pressure?

A: Use the pressure gauge safety valve included in the kit. Turn the valve clockwise to increase the pressure threshold (CO2 releases at a higher pressure), or anti-clockwise to decrease it (CO2 releases at a lower pressure). The valve also features an automatic release function to keep pressure within safe limits.

Q: How often will I need to recharge the CO2 generator?

A: Refill frequency depends on your bubble rate and tank size, but most users find a full charge lasts approximately 2–4 weeks. When CO2 output slows noticeably, simply replenish the citric acid and baking soda in the bottles for a fresh batch of gas.

Q: Is the tuning valve cleanable?

A: Yes — the tuning valve is fully removable for easy cleaning, helping to maintain consistent gas flow and prolong the overall lifespan of your CO2 system.