Natural Swimming Pool/Ponds (NSP's) are a chemical-free, low-maintenance alternative to traditional chlorine pools. The water is clean, crystal-clear, and filtered naturally using a built-in biological filter. by kathrine
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This instructable is for keeps our swimming pool water safe and clean, chlorine eliminates most dangerous contaminants. You need only a plastic bottle, chlorine tablets and some tool for make several holes in bottle body.
Natural Swimming Pond Designs from Gartenart - I LOVE this idea! No chlorine, the plants at the edge keep the water clear and you swim. I am seriously torn between this and an inground concrete stained pool.