Thought I'd pass these links on. A friend of my wife and acquaintance of mine, was found by a pool man one morning about a week ago... he had been relaxing in his hot tub after a day on the golf course the evening before, alone. His wife was out of town at their new home. Not sure if he fell asleep, had high blood pressure, or had a couple beers, but no matter what the cause, I'd say never get in a tub when home alone. I do not have a spa, just a pool, but just wanted to pass this along to spa owners who may be unaware of the dangers. They apply to pool owners too, but the heat in a spa just adds another variable. He was a very popular, well loved man, and his wife is in our prayers.