Back to the OP ... and ponds. I have three on old family land.... spring fed (a damn good flow) that I have only seen once when the original pond was drained once nearly 6 decades ago... one pond feeds another smaller one, then another, then into a stream.
If you don't have a good spring or creek feeding a pond.... then you have a big ol' pool of stagnent, nasty water imo. I've seen a few of those too....
I luv ponds .... good ponds
My largest one .... full of bass... and turtles .... I eliminated 4 BIGLY azz snappers from the next pond a few years back, and relocated at least 50 sliders.