I just finished my first rack and I'm trying to get the temps right now. I have a Herpstat 1 and 4" heat tape. I'm not up to 89 degrees on the hot side of my tubs yet, but I'm finding I need to set the herpstat with the probe on the tape to 106.8 or so to achieve this temp. Being new to rack heating I'm not sure if this is normal?

Can anyone one here help? Rack is in a room set at about 75 degrees...