Airstone Vario S – 125 mm
Simple, reliable, and effective — the Airstone Vario S is everything an air stone should be. At 125 mm, it's compact enough for small tanks but produces a dense, fine-bubble curtain that oxygenates the water and creates gentle, beneficial circulation.
What Makes This Product Special
The quality of an air stone is in its pores. Coarse, inconsistent pores produce large, inefficient bubbles that do little for oxygen transfer. The Vario S uses a high-quality sintered material with uniform fine pores, ensuring a consistent output of small bubbles — more bubbles, more surface area, more oxygen per liter of air pumped.
Key Benefits
- Fine, uniform bubbles — maximum oxygen transfer efficiency
- 125 mm length — perfect for small and nano tanks
- Durable sintered material — washable and long-lasting
- Standard 4 mm airline connection — works with any air pump
- Modular — remove the end cap to connect multiple units in series
- Suitable for freshwater and saltwater aquariums
- Creates a beautiful decorative bubble curtain
How to Use
Soak the airstone in water for at least 15 minutes before first use (this improves initial bubble output). Connect to your air pump using 4 mm airline tubing. Position at the bottom of the tank, optionally covering the base with substrate to stabilize. Adjust airflow with a flow control valve for the desired bubble density.
Who Is It For
Fish keepers needing reliable oxygenation, aquarists who run planted tanks and want nighttime aeration, shrimp keepers who need gentle surface movement, and anyone setting up a hospital or breeding tank.
Technical Specifications
- Length: 125 mm
- Type: cylindrical sintered air stone
- Airline connection: 4 mm (standard)
- Bubble size: fine
- Material: sintered mineral
Compatibility
Compatible with all standard aquarium air pumps and 4 mm airline tubing. Works in freshwater and marine aquariums. Expandable — connect multiple units in series by removing the end cap.
Expert Tip
In planted tanks with CO2 injection, run the airstone only at night using a timer. During the light period, airstones can accelerate CO2 off-gassing, reducing CO2 efficiency. At night, they prevent the oxygen dip that can stress fish and shrimp in densely planted tanks.
