Air Stone – 4cm Diameter x 5cm High – 6 Pack

Features:
– used increase oxygen levels in aerobic systems.
– manufactured from mineral stone (silica) + plastic
– durable, washable and sintered by high temperature.
– color: Blue
– connects to a 6mm outside diamater x4mm inside diamater polyethylene air hose (sold separately)
– not suitable for aerating worm tea or septic tanks as the porous openings foul up too quickly.

What’s in the box
6 x Air Stones