Ok i got my new rack right when we moved so i dont know if i need new flexwatt or what. but when the rack had one snake on it it held temps fine when i added more the temps dropped dramatically i dont know if the 3 inch isnt enough or that it was damaged in the move or what. But i was also looking at getting a herpstat for the rack and i am unsure on what to get. is there one that i can have a probe for each shelf? my current tstat is in the middle ish and the snakes temp is only reading 77 and my tstat is reading 92-95. Suggestions?