Radiant heat panels are the best options for large scale heating.


BUT...I personally wouldn't put a ball into that size enclosure. Ball's are very shy and even the largest would be overwhelemed to be living in an aquarium that is open on all sides. Unless you are planning on going nuts with tons of hides and decor (which you will have to maintain and clean all the time - yuck) and which will mean you will never see him anyway I am not sure why you would put him in there?

Maybe another lizard or different snake that is more comfortable in a large enclosure?