That depends entirely on how much water you add to the eco earth. Personally I prefer good old fashioned newspaper. It's easier to clean and you can feed in the cage without fear that some of the particulate substrates will stick to your snakes food and get swallowed along with it which in some instances, such as when using a bark substrate, can cause intestinal blockages.
I was gonna feed my snake in a separate container so he doesn't associate me opening his cage with food but I can't decide on substrate many people say use newspaper but it just doesn't look good