How Do I Measure the Water Temperature?
Forgers use digital thermometers, aquarium thermometers, and infrared thermometers. There's usually some thermal stratification, so the water at the top will be warmer than the water at the bottom, so you'll get higher readings from floating thermometers. Another way to think about water temperature is this:
Freshwater freezes at 32F, so if you've got ice in your Forge, your water temp is close to freezing!
by Thomas P Seager, PhD.