Hi,
I have my own tank so I have tried a few times to spend the night floating. Its never worked for me. I can't get past a few hours. I also find that my tank doesn't keep a perfect temp for hours on end. My body can pick on on that difference. I'm going to redo parts of my tank in the spring and get a much better heater.
I know another floater in Minneapolis who has been floating for over 20 years. He wrote a paper on this subject. I'll try to get a copy and pass it over to you. Give me a few weeks.
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