746. What is the maximum water volume a SpaGuts bathtub heater can handle?

Note that our bath tub heaters are rated for up to a 70 gallon hot tub. Any hot tub that is more than 70 gallons should consider using a spa heater. Using our bath heater for larger volume of water will result in never reaching the max temperature, or not even coming close to the max temperature. We don't recommend using our bath tub heaters for higher water volumes.