Probably most of us have had the experience of staying in a bath too long, so that the water cools too much and stops being comfortable. A float tank is essentially an oversized bath, and we want to be able to stay in for hours without ever losing that Goldilocks neither-hot-nor-cool temperature. So we need a heating system.
When I acquired my float tank, it wasn’t so much a functioning system as a collection of parts, and most seriously, the thermostat was missing. I’ve acquired a replacement and was testing it out last night — thought you all might be interested.