In Europe, natural swimming pools are an increasingly popular alternative to chemically maintained pools. Plants act as a natural filter and harbor beneficial bacteria to keep the pool clean. No chlorine or salt needed. in garden homesteading ^^
The plunge pool is a proper organic pool (natural swimming pool), only smaller. And this one is small enough to fit in a modest garden to bring the delights of plunging into organic water to more of us. (Click image for FAQs & instruction for making one.