@hugo7 covered everything pretty well. Back at my parents house we have a big pond, that is mostly very overgrown. They have never used a pump and the water always remains clear and there is lots of wildlife. They have lots of oxygenating plants though.
@hugo7 covered everything pretty well. Back at my parents house we have a big pond, that is mostly very overgrown. They have never used a pump and the water always remains clear and there is lots of wildlife. They have lots of oxygenating plants though.