Floatation therapy is quickly becoming a popular technique for minimizing the effects of jet lag because it allows you to gain extra rest in a condensed amount of time.
Although you usually lose many hours of sleep on the plane, an hour in a float tank can help make up for that loss of sleep; an hour of floating is roughly equivalent to 6 to 8 hours of sleep.
Floating will be most effective if you can float as early in the day as possible so that you are still ready for bed at night.