Just wondering if a former sewage lagoon (for one house) can be turned into a small pond for fish, plants, birds? Or something else good like a swimming hole. I know it depends on local laws, depth, soil, etc but in general what could probably be done with it? The lagoon had a tank before it and probably didn't get too polluted and hasn't been used for waste water for 3 years. Would it be clean now or easy to clean, or no? I would not try if it was a difficult expensive project. It has typical fencing around it now, but I was wondering about pulling it up and repurposing the fence too. One side is wooded, one side is open.