This is something pretty much every float center deals with on a regular basis. The first objection that a lot of people will say when they first hear about floating is "Oh, I'm too claustrophobic for that". Which... feels like getting shut down straight out of the gate. 

Graham and Ashkahn, as seasoned float center owners, have heard this all too often and are not only familiar with it, but have some excellent ideas as to why this is the first major objection people throw out there as well as good ways to combat this concern.