Even if you make one at home, it won't be perfect - you probably won't be able to use it more than once. At least you would have to replace the salt every time you use it. Building a tank with its own ...

Sensory deprivation tanks create a sound- and light-free space that many find deeply relaxing. Evidence suggests floating may help improve focus and relieve anxiety, depression, and pain.

LONDON, England (CNN) -- Floatation tanks have long been rubbished as a New Age gimmick, where essentially you pay a large amount of cash to float in a dark room in a bath full of salts.