Alumina Airstone 1 1/2" X 1 1/2" X 12" - 3/8" barb AquaFountain This product weighs approximately 390

This product weighs approximately 390 pounds and ships via Motor Freight in a protective wooden crate

The 3 columns are approximately 20

This popular product is designed to treat algae in both small garden ponds and large earth ponds

The filter brushes reduce cleaning frequency and are less restrictive

The replacement diaphragms are included in these repair kits

Alumina Airstone 1 1/2" X 1 1/2" X 12" - 3/8" barb AquaFountain This product weighs approximately 390This high quality, fine bubble diffuser is constructed of an Alumina product, which is 3 times stronger than glass bonded silca air stones. It has a 3 8 barb fitting.