Ozone aerated stone, bubble stone, using super hard gold steel sand, after high temperature sintering, good gas diffusion, good filterability, ozone resistance, corrosion.
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, can be reused and washed repeatedly.
Creates bubbles in fish tank while attached to an air pump(air pump and air tube is not included).

Specifications:
Color: As picture
Material: hard gold steel sand
Item Size: Approx. length 4 inch (10cm), 6 inch (15cm), 8 inch(20cm), 10 inch(25cm), 12 inch(30cm),
14 inch(35cm),16 inch(40cm) for your choice.
Package include: Only 1*air bubble stone (no tubes, no air pump)
Suitable for inner diameter 4mm soft tube