The tank has about 800 pounds of epsom salts that is dissolved in 10 inches of warm water, heated to body temperature . The absence of sensory stimulation in the tank allows for relaxation and sometime some pretty trippy experiences. The tank reduces the stimuli of the outside world so the body and mind can relax. I go about 2 times a month and wish I could go more but its kind of a pricey thing to do. I go for an hour each time and after the hour is up, I wish I could go longer because it feels so good.
Quote from Joe Rogan "It’s like layers of an onion. When you first start doing the isolation tank, you can only get a couple of the layers of the onion in, a couple skins loose. You can’t really go to the core. It’s too hard. It’s too large to completely let go who you are. But as you get better at it, and as you get more and more comfortable with the experience, you get better at actually letting go—really letting go".