A float tank is not as much an object as it is an environment. An environment whose purpose is to act as a counterbalance to every other interaction we have with the world around us. It is a place of rest. It is an environment that allows our bodies and our minds to take space from the society that has been built around us, and to instead turn focus internally. A chance to check in with ourselves, uninhibited and unadulterated by the external forces that are otherwise omnipresent. There is no magic in the float tank, the magic is us. Our bodies have spent millions of years learning how to take care of themselves, and the float tank simply provides the optimum environment with which to do it.

floatation room

Salt helps you float

Each tank holds a solution that is about 2/3 water and 1/3 Epsom salt. With the 10” of solution that most float tanks are designed to hold, this comes out to about 850 lbs of Epsom salt. The Epsom salt adds density to the water, which in turn makes our bodies very buoyant. As a person lies on their back in the float tank, their body floats on the surface, half in and half out of the water. This buoyancy has an incredibly rejuvenating effect on the human body. While used primarily in the float tank to actually make people float, Epsom salt comes with the added benefit of softening skin and hair, cleansing and detoxifying the body, and getting people the magnesium most of us are lacking.

How salty is the float tank?

Buoyancy in the float tank is most commonly recorded as a measurement of specific gravity (a comparison of relative densities). With pure water holding a specific gravity of exactly 1, the ocean comes in at about 1.025. Float tanks usually sit in the 1.27 – 1.3 range, making them up to 12 times more buoyant than ocean water.

Ocean water is about 3% salt.
Float tank water is about 35% salt.

The closest experience to this that most people know of is the Dead Sea, a hypersaline lake in Israel known for its ability to keep people afloat. The specific gravity of the Dead Sea is about 1.16, just half that of a float tank.

Neutral in temperature and soundproof

The temperature of the water is kept at 93.5 degrees Fahrenheit, the average external temperature
of the human body. This is a temperature known as skin-receptor neutral, meaning the water creates no cues for the skin to report as tactile stimulation.

The tanks and the rooms around them are soundproofed to block all noise from the outside world, and light-trapped to create complete and total darkness.


At Rest Assured kootenay floats we provide what are known in the industry as “float rooms” they provide space so you have plenty of space to stand up and move around.

floatation room example

floatation room example


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