External CO2 Atomiser with Locking Bolt Seal – Ultra-Fine Ceramic Diffuser

The Castle Dawn Aquatics External CO2 Atomiser delivers a powerful and secure method of diffusing CO₂ into your aquarium. Designed for use with high-pressure CO₂ systems, this pro-grade atomiser uses a high-density ceramic tube to create ultra-fine bubbles, ensuring maximum dispersion throughout the water column.

Its robust locking bolt mechanism provides a tight, leak-proof seal, even under high pressure, making it a reliable choice for aquascaping setups. Available in two sizes (M1 for 16/22 mm tubing and M2 for 12/16 mm tubing), this external diffuser connects securely to your CO₂ line and remains outside the tank for a cleaner aesthetic. Includes a 1‑Year Warranty as a mark of our confidence in its build quality.

Key Features and Important Notes:

• What’s Included:
  – 1 × External CO2 Atomiser (Choose M1 or M2 Size)
  ⚠️ CO₂ tubing and regulator not included.
• Size:
  M1 – 11.2 × 3.5 × 2.8 cm (H × L × W) – 4.41 × 1.38 × 1.10 inches
  M2 – 13.5 × 3.5 × 2.8 cm (H × L × W) – 5.31 × 1.38 × 1.10 inches
• Hose Compatibility:
  M1 fits 16/22 mm tubing; M2 fits 12/16 mm tubing.
• Ultra-Fine Diffusion:
  High-density ceramic tube creates microbubbles for excellent CO₂ absorption.
• Secure Bolt Lock:
  Tight-sealing lock and bolt mechanism prevents gas leaks under pressure.
• External Setup:
  Installs outside the tank to keep equipment out of view.
• Break-In Period:
  Runs best after 48 hours of use when the membrane reaches peak performance.
• Warranty:
  1‑Year Warranty (T&Cs apply)
• Spare Parts Available:
  Replacement ceramic tubes sold separately – message us for details.
• ⚠️ Warning: Beware of cheap CO₂ accessories sold on large e-commerce platforms. Many lack proper pressure handling and may pose serious safety risks. Read more on our blog about the dangers of low-grade manufacturing.
• ⚠️ Counterfeit Alert: Due to its popularity, fake versions made with unsafe materials are being sold. These imitations may fail under pressure and harm your aquarium setup.