Build a koi pond, use it as a pool. Swim with the fishes.
I sort of do that when I clean the filter of the koi pond that I built. If I had made the pond about a foot deeper it would almost be a pool, would have protected from the darned herons more too. Great thing about the koi pond are the mosquito fish, never get bite by mosquitoes in my yard. No chemicals to mess with either. Probably would be cheap to DIY out west if rocks are plentiful. Looking forward to eating the first tilapia soon!