GC Tek 2 HP Media Agitator/Blower for Bead Filters and Sand Filters Lake which means that they are

which means that they are electronically controllable

Check valves are essential when using a waterfall filter in conjunction with a pond skimmer

healthy fish

1 tab treats 100 gallons

Limited Lifetime Warranty on tank

GC Tek 2 HP Media Agitator/Blower for Bead Filters and Sand Filters Lake which means that they areShips directly from the manufacturer, typically in 2 4 weeks. This is an excellent replacement Agitator for any bead filter, sand filter, or similar pressurized filter in need of a little help when back washing to shake loose lodged debris for a complete and thorough backwash. Comes with a 6' power cord and an on off switch. 2" connection.