Hakko Air Pump HK-25LA w/Air Filter

The Hakko Air Pond 25LA is half the size of the 25LP air pump. It's a little quitter than the 25LP because of the metal housing. For outdoor use, it is recommended that the air pump be enclosed to protect it from the elements. This is an external air pump not to be submerged. Tubing (Not Included). The outlet fitting is approx 5/8" O.D. This 25LA comes with a 3" air filter to make it suitable for outside ponds. 

 
These air pumps can be used to create a large column of bubbles rising from the bottom of a pond or lake. It brings oxygen depleted water to the surface where the bubbles burst and create tremendous surface turbulence, circulation and aeration.