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
Stock tank pool I can't thank my children enough for this fun cool place to enjoy when the temps hit 110 to 120 this summer. This little pool has a fabulous saltwater filter, waterfall and tons of shade, plus light for nighttime.