Is it possible to do a back to back session, in one day?

There are three hour floats, if you want more than three hours, I'm not sure they offer it but that would be a very long float and at that point the benefits might not continue

Hi! You can do as long a float as you want. People have even done over-night floats with great success. Typically, with longer duration floats, the central nervous system benefits greatly, whereas the physical benefits begin to plateau. Your brain will experience more frequent and prolonged states of the Theta frequency, and this is tremendously beneficial for creating a more profound change in your day to day life. The longer floats are admittedly more difficult for most, so it's best to have a consistent practice and lengthen gradually.