Can you tell me if it is more energy effecient to keep my hot tub plugged in and running all the time or should it be on a timer or should I unplug it and plug it back it when I want to use it (about 3-4 times a week)??  My hot tub is about 2 years old, good condition, seats 5 people, with a lid.  Any information would be great!!  Thanks!!