History of Floating
So where did these crazy tanks come from? Did we invent them? Yes. Well, no. What actually happened is that in 1954 a neuroscientist named John C. Lilly needed to eliminate incoming sensory information to create a control group for his experiments.
He ended up discovering that sensory deprivation has a load of benefits that far superseded whatever wild experiments he was doing.
By the 1970’s, the tank’s design had evolved from Lilly’s original laboratory chambers to the comfortable commercial tanks that we have now. This means you’re not submerged in the water with air tubes, you don’t have to wear a diver’s helmet with a black faceplate, and you don’t have to have experiments run on you.