Hi everyone! I am looking for a solution to heat up photo chemicals (I'm doing darkroom printing in a cold garage). I need the chemicals to remain at a fairly steady 20 degrees C, whilst the air temperature is significantly lower (e.g. 7 degrees). My question is whether or not an infrared heat pad such as this one will heat up the chemicals? Are the wavelengths correct to ensure the water is heated? I read that IR heat does not heat air. I will connect the heat mat to a thermostat with a probe in the chemicals. Many thanks!