I've been thinking about doing this for a bit now too. I haven't quite figured the filtration yet, I suppose some kind of diy wet/dry and a pond pump. The thing I'm worried about is the temp in the winter. What I'm thinking about doing is partially burying it as you mentioned, getting a solar blanket to put on it at least on cold nights (it gets in the 40s at night for a few months, maybe down to freezing 10 nights out of the year). I'm also playing with the idea of using the included pool pump along with a grid of black pvc pipe or other hose to utilize solar heat in winter. If the temps aren't going to work out then I'll have to go with natives (would be cool to have a gar).
Here's something else to think about...wouldn't it be cool to set one of these up and swim in it with a mask & snorkel? Talk about up close & personal
Here's something else to think about...wouldn't it be cool to set one of these up and swim in it with a mask & snorkel? Talk about up close & personal