I don't know how many ponds gain water thru the winter. Ours here sure don't!
Thats one of those "to many factors" I am trying to figure into the scenario. I have a spring that runs over the ground surface into the pond. It has constant flow, and thru out the winter with warm ups it gets heavier with run-offs of cold water. I'm thinking that that the amount of cold water that comes in is probably less than what an aerator would accomplish as far as getting the water to cold. Then again, if someone would have a constant large influx of water into a pond, during winter time, may be they have something to worry about ...... Could it be that if a bunch of cold water is dumped into a pond it would sink to a layer that the fish avoids. Since an aerator is not running it won't be thouroughly mixed with all the other water?
