Deep in the Gulf of Mexico exists a so-called "Jacuzzi of Despair," a pool of oceanic water that kills anything that enters ...

Instead of adding chemicals directly to your hot tub, you add salt (about two pounds per 100 gallons of water), which dissolves to produce natural chlorine that's needed to keep your hot tub clean.

The Pure Silk water purification system is also available. Patio Round hot tubs come with a plug ... What we like We like that this tub is salt-system ready, meets California Energy Commission ...

A chic cedar hot tub is at the top of our wishlist as ... and is able to be used chemical-free and filled with salt or fresh water. See the full story on Dwell.com: These $5.9K Cedar Hot Tubs ...