Originally posted by Waterloo:
My pond gets alot of surface disturbance from the wind. Other than that, no. I have been running the water to the bottom of the pond thinking that adding to the surface (which I used to do) would mix with the warm surface water and defeat the purpose of adding cold water. .........
Waterloo, in my experience, adding groundwater to your pond by first letting it run over land, gravel, sluice box, or some sort of substrate before it hits yer pond is the most beneficial way to do it. this will oxygenate it to some degree but not radically change its temp. as the cold water enters the warmer water of your pond, it will form its own current, and since it is more dense than the warmer pond water, it will still find its way towards the deeper levels of your pond.
we have some Pleistocene remnant saline lakes out west here that have feeder streams and creeks entering them. fisheries biologists have tracked the freshwater currents for many hundreds of yards out into the lakes.....rainbows, cutthroats, and brown trout have been documented to enter the saline lakes via the freshwater creek currents, and to dart in and out of these currents to gorge on brine shrimp, and then turn back and head back up the creeks from whence they came...pretty fascinating stuff. i would think cold well water would exhibit a similar fluid dynamic entering warm pond water.
