The Chihiros CO2 Regulator Mate 21.8 is a CO2 regulator designed for planted aquarium pressurized CO2 systems. It helps control CO2 output from compatible CO2 cylinders, making it useful for high-tech planted tanks and aquascaping layouts.
The Chihiros CO2 Regulator Mate 21.8 is suitable for aquarists who want stable CO2 delivery for aquatic plant growth. CO2 injection is especially useful for carpeting plants, red plants, dense stem plant layouts and high-light aquariums. Stable CO2 helps plants grow healthier and can reduce algae issues when balanced with lighting and nutrients.
Use only with compatible CO2 cylinder valve thread and fittings. Always check the cylinder standard before purchasing.
Technical Specifications
- Product Type: Aquarium CO2 regulator
- Brand: Chihiros
- Product Name: Chihiros CO2 Regulator Mate 21.8
- Thread / Compatibility: W21.8 compatible CO2 cylinder connection
- Function: Controls CO2 output from pressurized cylinder
- Best For: High-tech planted aquariums and aquascapes
- Application: Freshwater planted aquarium CO2 system
- Use With: CO2 cylinder, tubing, bubble counter and diffuser
- Usage Note: Confirm cylinder valve compatibility before purchase
FAQ
1. What is Chihiros CO2 Regulator Mate 21.8 used for?
It is used to control CO2 output from a pressurized CO2 cylinder.
2. Is it suitable for planted aquariums?
Yes, it is suitable for high-tech planted aquariums and aquascaping setups.
3. What does W21.8 mean?
It refers to the compatible CO2 cylinder connection/thread size.
4. Should I check cylinder compatibility?
Yes, always confirm your CO2 cylinder valve standard before purchase.



















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