A nice airstone, one that will put a lot of bubbles on the surface, will add
the oxygen. However, warm water doesn't hold too much, so you want to shade
the pond if possible. You can shut the airstone down when you're sitting by
the pond to watch the fish, if you want to, but DON'T forget to turn it back
on. Run it at night, too. My fish like to swim back and forth through the
bubbles, kinda like kids! I guess it tickles . . .

Lee

"jammer" wrote in message
...
Besides plants, is an air stone the only way to increase the oxygen?
This is the first full summer for the pond and it is HOT. Is there a
danger zone temp where water HAS to be cooled or air MUST be supplied?
I don't have electicity out there yet. I could run the trouble light
out there and throw in a small aquarium stone i have, but it would
have to be during the day when no one else was home.

This is a 60-70 gallon job and I have 2- 4 inch goldfish and about 30
toadlets.

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