Aquarium Air Stone Great gift idea! Model# BT1111 .5" x .5" x 1.5" with 5/32" barb, Medium Pore Air Diffuser

You get two {.5" x .5" x 1.5"} air stones with a 5/32" OD barb

High Quality American Made Air Diffusers. UNLIKE the blue import bubble stones,

this diffuser is low maintenance, durable and lasts a long time.

Manufactured from 100% Glass-Bonded Silica, this air stone has been

  renowned worldwide for the past 30+ years as "the most

efficient way to increase dissolved oxygen levels in a tank."

Now available in an aquarium application.

Standard Air Line Connection, 5/32". Self-Weighted and Non-Clogging.

Bubble-stones increase surface agitation and oxygen levels,

eliminating "dead" spots / stratification.

Bubblemac Air Diffusers Promote Healthier Fish by Reducing Stress.