Even with 4,500 gals., if the water temp. is high and you have a lot
of plants I would run a couple of air stone just as cheap insurance.
(especially at night when plants draw oxygen)

http://community.webshots.com/user/hankpage1

"Szpond" wrote in message
...
After going through the power-outage worried to death about our
pond, I must
buy a battery operated oxygenator. All I can find is a tiny one
(around $13)
which is made for transporting your fish - don't think that would
help much.

Is their a larger battery operated oxygenator available anywhere?
Any other
"must haves" in case this happens again? Thanks for your help.
Cathy