I was wondering what could be wrong on a hot tub when the ground breaker will not stay on? We know the breaker itself is not broke, but we don't know what we need to do, can you help?

I assume it is a GFI breaker, so there can anything from a nick in the cable feeding the tub, to water or moisture in the control box, or a problem with the electric heating elements, which are immersed in water, to a fault current leak in the pump motor.

Finding a fault like this can be like looking for a needle in a haystack, but can be done, using an accurate multimeter, and best to have the specs of the motor, heaters, etc. and knowledge of control and power wiring in the appliance.

May be time to have a service tech look at it.