Spending time in a dark tank of warm salt water might sound a bit wacky, but converts tell the Mother Nature Network that it treats ailments including insomnia.

Though it sounds woo-woo wind chimes and fairy dust crystals, it’s a sensory deprivation healing modality that helps the body both physically and mentally. Studies performed in the United States and Sweden indicate that flotation therapy (tested in tanks) delivers wide-ranging benefits including significant reductions in not only stress, but also chronic pain, swelling, headaches, depression and insomnia, all while lowering blood pressure and improving skin.