Circle Fish Tank Aquarium Air Stone Oxygen Aerator Increasing Air Bubble Item Pond Pump Hydroponic Oxygen Supply Stone Features: Increase oxygen levels, lower CO2 and raise PH, creates water currents It is an important instrument to successfully keep aquatic fish for respiration process. Durable, washable and sintered by high temperature. Creates bubbles in fish tank while attached to an air pump(air pump is not included).

Specifications:

Color: Green or Orange

Material: Stone

Item Size: Small Outer diameter 7 cm,

Medium Outer diameter 10 cm Item

Weight: Approx. 56g/94g

Package include: Only 1*air bubble stone (no tubes) Suitable for inner diameter 4mm soft tube