Marine Metal Air Stone Donut

The Marine Metal Bubble Donut is a weighted glass bead Diffuser for use with portable aerators. Tough and durable disk attaches easily to a standard silicone air line and stays on the bottom, ensuring even dispersal of dissolved oxygen.

Comes in 3" and 5" weighted glass bead diffuser.

Requires a 1 hour pre-soak in water before the first use.

For use with portable aerators

Attaches to standard silicone air line

Ensures even dispersal of dissolved oxygen