Alumina Airstone 1 1/2" X 1 1/2" X 12" - 3/8" barb AquaFountain This popular product is designed

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

Self priming - will prime up to 5' above water level (must prime on initial start-up)

The filter brushes reduce cleaning frequency and are less restrictive

The 3 columns are approximately 20

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

Alumina Airstone 1 1/2" X 1 1/2" X 12" - 3/8" barb AquaFountain This popular product is designedThis 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.