I have the probe in the tub dirrectly over where the heat tape sits, the room is 74-80ish I dont really keep track of it but its not all that cold and I have my air go on only 4 hours a day.

The heat rope is in a canal in the rack, but when the heat tape was there it was across the rack so the tubs did rub them but there was no other way to do it. AP told me to put it across the middle of the shelves and since there was one connection for the entire cord that was the only way it would fit the rack