Very disappointing...wouldn't recommend
Spa Pro Massage Stone Heater 18 quart
First heater I got Jan. 2012, lasted 9 1/2 months with 43 stone sessions. Replacement second heater from manufacturer (no warranty on second Spa Pro Stone heater) lasted alllllmost 4 1/2 months with only 20 stone sessions on it. NOT for anyone with a busy practice!! Yes, Spa Pro, I take care of my equipment.