We thought this was so cool we did it twice! The first time we did it, as there were two of us, they have to wash your feet first to keep the fish healthy. My feet were washed first, so as I was sitting on the cushion waiting for my husbands feet to be washed the person had me put my feet up on each side of the tank but not in the water yet because it is a timed event and I had to wait for his feet to be washed, but as soon as my feet were on top of either side of the glass the fish were going crazy trying to get at my feet lol! When we put our feet in it felt strange, it was like a steady vibration and that it! It was just so neat and our feet were smooth when it was done. $21 USD for 15 min. total price for two people.