So my new house I've moved into has a pond an waterfall. I've been running the waterfall for a hour or two almost every day hoping that would be enough to keep it some what clean. That is not working. The waterfall is about 5' tall an has several steps downs that are empty. So I've been thinking adding some sort of media to them. Like maybe some lava rocks or what else I'm not sure. Or maybe i just need to run it more often. Any ideas about how to better use the waterfall to filter my pond would be appreciated
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