75-80 is fine for the rest of the tank. if it drops below 75 then something needs to change. i keep mine at 80 everywhere, and 93 on the hot side. works great. also depending on how many snakes u have and how much u want to spend, u can get thermostats from $25-300 or more. i use the reptitemp 500 cuz its 25 bucks and works good for my 2. and i have a red bulb on the majority of the time