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.

Each lightweight tub—weighing in at just 220 pounds—arrives pre-assembled 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 ...

Stimulate circulation- Soaking in warm ... Fill a large tub with lukewarm water, add a few drops of any essential oils, and half a cup of rock/sea salt, and soak your feet for 20 minutes.