I have used an Oase Pond-Air 30 aerator pump for wintering my fish
over. The last pump is about to bite the dust and Oase has
discontinued the manufacture of this little rotary vane guy. 1) Does
anybody out there have a Pond-Air 30 you would sell? 2) Do you have
any idea where I might find a Pond-Air 30 new in the box?

Alternatively, what is a comparable aerator pump to the Pond-Air 30?
My pond is about 500 gallons.

Thanks for helping with this.