by Stoyan Rusev, Aquarium Boutique
Why CO₂ Matters in a Planted Aquarium
CO₂ (carbon dioxide) is one of the three essential elements for plant growth—alongside light and nutrients. In nature, CO₂ is constantly available through water movement and gas exchange. But in a closed system like an aquarium, it’s often in short supply.
Without enough CO₂, even with good light, plants may struggle. Growth slows, algae take over, and frustration builds.
A well-regulated CO₂ system changes everything: plants grow faster and healthier, colors are more vibrant, algae are reduced, and overall stability improves.
When Do You Need CO₂?
You probably don’t need CO₂ if:
- You only grow hardy plants like Anubias, mosses, or Cryptocoryne
- Your lighting is weak (under 30 lumens per liter)
- You prefer low-maintenance setups
But you will benefit from CO₂ if:
- You use medium or high lighting (like Chihiros B or WRGB series)
- You grow more demanding plants like Rotala, Hemianthus, or Alternanthera
- You want a balanced system and natural algae prevention
- You want your aquascape to thrive, not just survive
CO₂ Systems from Oxyturbo – Quality You Can Trust
Oxyturbo Major 2 – High-Precision CO₂ Regulator
Oxyturbo Major 2 is a high-quality CO₂ regulator designed for planted aquarium enthusiasts. It offers precise control, stability, and compatibility with all standard pressurized CO₂ cylinders.
Key features:
- Dual pressure gauges for monitoring cylinder and working pressure
- Integrated needle valve for fine-tuning gas output
- Quick-connect outlet for standard 6/4 mm tubing
- Durable construction for long-term use
- Compatible with rechargeable CO₂ bottles
This model is perfect for beginners and advanced aquascapers alike who want reliable performance and full control.
Oxyturbo Major 2 with Built-in Solenoid Valve
This version includes an integrated solenoid valve for full automation.
You can connect it to a timer or pH controller so that CO₂ is only supplied during lighting hours. That saves gas and increases system efficiency.
Additional benefits:
- Fully automated CO₂ supply
- Reduces waste and increases safety
- Clean and compact installation
- No extra fittings or adapters required
CO₂ Splitters for Multi-Tank Setups
If you have more than one aquarium, you don’t need a second CO₂ system. Oxyturbo splitters allow you to distribute gas from a single cylinder to multiple tanks.
Oxyturbo 1-2 CO₂ Splitter
- Connects one CO₂ source to two aquariums
- Each output has its own needle valve for precise adjustment
- Built-in check valves prevent water from flowing back into the regulator
- Compatible with 6/4 mm tubing
- Ideal for hobbyists running two tanks or dual scapes
Oxyturbo 1-3 CO₂ Splitter
- Distributes CO₂ to up to three aquariums
- Each output is independently adjustable with its own needle valve
- Integrated check valves on all lines
- Designed for multi-tank setups or aquascaping galleries
- Solid, durable build for long-term reliability
What You Need for a Complete CO₂ System
Here’s a quick checklist to build a full and reliable CO₂ setup:
- CO₂ cylinder → Oxyturbo 500g or 2kg bottle
- Pressure regulator → Oxyturbo Major 2 (manual or with solenoid)
- Diffuser → Chihiros Diffuser
- CO₂ tubing → Chihiros PU-resistant tubing (6/4 mm)
- Drop checker → Visual CO₂ indicator with reagent solution
- Fertilizers → MasterLine All in One (liquid) + MasterLine Root Caps
- Dosing system → Chihiros Dosing Pump (2-channel auto dosing)
Why We Recommend MasterLine and Chihiros
MasterLine offers balanced and proven fertilizers that work exceptionally well with CO₂ injection.
Start simple with All in One, and add Root Caps if you use an active substrate like Master Soil.
Chihiros goes beyond lighting: their accessories include reliable CO₂ diffusers, tubing, and smart dosing pumps, designed for clarity, efficiency, and aesthetics.
Frequently Asked Questions
Will CO₂ harm my fish?
No, not if regulated properly. Always use a needle valve and drop checker to keep levels stable and safe.
Is CO₂ difficult to set up?
No. With a good regulator like Oxyturbo Major 2, it’s a one-time adjustment and just occasional checking.
Is it expensive?
CO₂ is an investment, but it pays off quickly. You’ll get faster growth, healthier plants, fewer algae, and a more stable tank overall.
Final Thoughts
CO₂ is not a luxury—it’s the backbone of most successful planted tanks.
With the right tools from Oxyturbo, MasterLine, and Chihiros, you get not just control, but confidence.
From hobbyists to aquascapers, a good CO₂ system opens up a whole new level of success.
Explore all Oxyturbo, MasterLine, and Chihiros products here:
👉 www.aquarium-boutique.com
Need help choosing your setup? Message us, and we’ll build the right solution for your tank.