Without attempting to get into any debates or conflicts, I think there's a simple misunderstanding here about the differences between thermometers and thermostats.
From what you've described, it sounds like you have a thermometer measuring the temperature of your UTH. (Ie. It tells you the temperature, but it doesn't regulate the power of the UTH in any way.) So far you yourself have had to be vigilant and make sure the UTH doesn't get too hot. Which is good for you! Some people wouldn't even monitor those temps daily. Others don't have a thermometer reading the temperature of the UTH.
BUT, a thermostat will actually control the heat of your UTH. That's it's job! A thermostat is the "means of adjusting" your UTH that you say it currently lacks. A thermostat has a temperature probe attached to its unit. When the probe senses your UTH is too hot, the thermostat unit turns the UTH off or down until the UTH is back at the desired temperature.
It might be helpful if you post a picture of what you are describing as a thermostat. Unless it's something like a Zilla model, Hydrofarm, or Herpstat... it might actually be a simple thermometer. In which case, you can still invest in a thermostat, and then rest assured knowing something is regulating your UTH for you! Making your job easier and more fun.I have a thermostat. but that only READS the temperature, it doesnt CONTROL it.
Above all, this is my attempt to be helpful and clarify a potential misunderstanding. Please accept it as advice and nothing more!
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