I have spent a while looking for ways to control the temperature of a terrarium (in my case, specifically a nepenthes terrarium) and have been unable to find any really stellar (at least under $150) ways to achieve a nighttime temperature drop. What methods do you guys use for this purpose? It's highland nepenthes so I'm thinking 75ish in the day and 55-60ish in the night, does this sound about right? This will probably be applied on a 30 gallon terrarium. Thanks for the advice.