What is this snake?!

[FL-HomeOwner]

Hey everyone,

Woke up this a.m. and walked out to the pool to empty the leaf catcher and this guy was inside. He seemed to be paralyzed because of how cold the water is but he is very much alive. I have two dogs so I want to identify him and make sure he is not poisonous before I just let him go. Put him in a large container for now until I figure it out.

This site will not let me post any pictures, I do not know why. Trying to figure out how to get the pics on here.

The snake is brown with two black stripes on each side with a light, yellowish belly. He also has some kind of marking on his head which look like marks that are just starting to develop. It is obviously very young. The stripes are vertical and go from a light tan to a dark brown. But like I said, are only on his head and then stop as if they have not developed fully yet. The rest of him is the brown with black stripes.