Thermostat Probe Mount

Made a mount to mount my Thermostat probe for my Snake tub to the floor on the inside above the heat mat (stuck to bottom outside), they say stick this to your heat mat but probes are not removable from the thermostat, the mat will unplug. Created this to glue to the bottom of my Tub, so the probe slides in and reads the temp on the bottom of the tub staying put, and slides out for removal and tub cleaning.