Pond Boss Forums POND CONSTRUCTION Selecting a site Possible Trout Pond

Adam:

Just remember a spring doesn't have a one-way valve on it. If the water pressure in the pond is greater than the underground water pressure in the spring, the water will flow into the ground.

Trout don't do very well in water temps above 70�F. So, it will depend on how much the spring flowing into the pond can cool the water.

Also, most underground water (as from springs or wells) doesn't have enough dissolved O2 in it to support fish. The good thing is that once the water contacts air, it takes on O2 at a fast rate. The trick is getting the water in contact with the air. That, and outgassing is why Cecil uses a stacked colump to oxygenate his well water before it hits the pond (and to remove some iron too).