You can still use your accurite the same way... place the probe in the warm end and the body at the front of the tub, but still inside. You should be able to see it just fine.

This rack is run off of two separate strips of 4" flexwatt. You can run them both in the same thermostat or run each in its own thermostat to play with the temps more. I use a 4" water bowl at the cool end of the tubs and mist when the snakes are in shed. Everything seems just fine.