If you want that sensory deprivation feeling, you have to control the air temperature as well and keep it in the dark, and it's larger than a big tub. There is a company that makes a sensory deprivation float tent that will sell you all of the parts and salt. I looked into it a bit after enjoying my local float place. Maintaining the filters, the pH and dealing with the hundreds of pounds of salt seems like more trouble than it's worth.