I didn't even think of insulating the tank to help with this problem. Thank you!
I just went out and purchased some insulation foam board from my local hardware store. If you guys don't mind me asking, what is the best way to attach it to the tank?
I will look into getting a space heater, too.
Cut the insulating board to fit and tape it to the outside glass. It probably won't look pretty but it will get the job done.
Covering the mesh top with foil will also help keep heat and humidity in the tank.