Something terrible happened to me today, my cornsnake died by a car accident, no joke.
So Im giving the thermostat to my ball python now and also the UTH of the cornsnake im gonna put it on the ball python's cool side.
What i need to know is, should the heatmats cover all the bottom of the aquarium or a small part as the cool side and a small part as the warm side is enough?

both my uth are small and not big enough to cover the all of the bottom , so righ now she has 3/4 without UTH and 1/4 warm side.