How large is your pond? How deep? Do you aerate?
The oxygenation issue sounds bogus, unless perhaps you have a very small pond.
Fountains are pretty, but not the best for aeration/oxygenation.
1/2 acre and the deepest is 17 ft. I currently don't aerate.
Aeration is a good idea, but so is the well. In the regulation crazy country we live in you soon won't be able to drill a well. Also if you suffer thru a drought like we had last year, your pond will be gone or severely damaged without a well. Good luck.
