Float tanks: Considerations for environmental public health
Floatation refers to a meditative activity in which users float in a high-density Epsom salt solution in a dark, quiet environment. Because float tanks are distinct from swimming pools and other recreational water, questions have been raised regarding the need for and efficacy of various disinfection methods. Although direct evidence is lacking, pathogen kill assays and field studies from recreational water suggest the need for caution regarding H2O2+UV as a disinfection method. Float tanks do not appear to be risky in and of themselves; further research on floatation tanks under normal and worst-case operating conditions will help to inform best practices.