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.

Comments?