I cant really see from the pic but are those dial thermometers?

If so, ditch them! Take them outside and smash them with a hammer

seriously though, get digital thermometers. If you REALLY want to know everything thats going on temp wise, get 3 digital thermometers

Two with probes (one on the hot side one on the cool) and then get one with ambient air temp and a hygrometer (humidity gauge)

I run 3 thermometers in my tubs but thats because I have severe OCD and have to know every temp in the enclosure.

but you could just run with 2 and still be fine, one with a probe (on the hot side) then the ambient air temp/hygrometer on the cool side

Hope this helps