Switching from tubs to rack

[OTorresUSMC]

I'm in the process of getting my new rack up to temps before moving my snakes, I picked up the 3 high sub adult rack from Cserpents and moving them from tubs with the UTH taped to bottom. My question is how high are your thermostats set to get them up to a hotspot of ~90 degrees? In my tubs I could set them to 92 and the tubs are almost perfect, in the rack it's been sitting with the thermostat set at 96 and not getting anywhere close.

Same room and using a herpstat

What is your heat element tape or UTH pad and are the tubs sitting on the heat source? I know you said its recessed? So is there a gap between the tub and the heat source? Also the reading you are taking in the tub that is the surface temp of the hotspot not the ambient air correct? If your heat source is reading the same temperature as your thermostat but the surface hotspot of the tub is much lower than you are having significant heat loss somehow. Any pics of the set up?

Sent from my SM-G935V using Tapatalk