Hi I am pretty sure I did fluidtherapy at Cleveland Clinic when I was there. Mine was a machine with sand and I stuck my legs which have rsd in them. There were different speeds but I could only tolerate the low and different temps. It was used to desensitize the nerves. Gradually I was supposed to work on higher temps and stay in it longer. I did not stay at the program because of my pain level. The therapist said though that people with nerve conditions have found it helpful. Sorry I could not offer more.