CESFRE Nano Air Stone Ring with 304 Stainless Steel Double Frame + 4 m PVC Air Hose - Aquarium & Pond Air Vent for Fish Farming, Oxygen Supply with Micro Bubbles (Double Ring Diameter 25 cm)

1. **️ EXTRA FINE MICROBUBBLES - EFFICIENT OXYGEN ENRICATION** The high quality nano tube produces ultra-fine bubbles (below 100μm), which significantly improve oxygen solubility in the water - ideal for fish farming, hydroponics and pond aeration. 2. ** HEAVY DUTY 304 STAINLESS STEEL FRAME - STURDY & SELF SINKING** The round air stone is equipped with a durable 304 stainless steel frame that provides stability and sinks independently to the pond or pool floor. Additional weight can be used for deeper ponds. 3. ** Even air distribution & low noise** The round shape ensures even bubble distribution throughout the area - perfect for avoiding oxygen deficiency and without annoying noise. 4. ** High quality material - Flexible & durable** Made of durable, flexible EPDM or silicone material, the air stone offers high micro hole density, good ventilation and moderate clogging resistance. 5. ** Essential for heat periods & intensive fish farming** Especially in summer there is a risk of oxygen deficiency - this air stone helps to avoid fish loss. For mud ponds or deep installations, the use of a stronger air pump system is recommended.