I picked up a RKL yesterday and have a quick question regarding the Temp probe. Is it safe to have the whole probe submerged? I have a BC14 and in order to have the probe in the same chamber as the heater it will be fully submerged or very close to it. Otherwise I will have to use chamber 3 which is where the water level drops and risk the temperature probe being open to the air, not likely with my ATO but possible.