starter set up

can i really control the temp and humidity that close in a 20 gal tank its only like 2 feet long the tank that is i would think it would be the same temp through out the tank unless its like radiant heat your talking about.

I have kept a 82-84 cool side/92-94 warm side in a 10 gallon aquarium before....I am sure you can do it with a little work in a 20 gallon :)

what is my best bet for holding those temperatures in that size enclosure. should i close off the center of the tank and let the edges be the breathing holes or what.