So a good friend of mine no longer wants his two turtles, that he says are male and female, and pretty big.
They are aquatic turtles, but I know nothing about what I'm getting myself in to. He's not sure what type of turtle they are either.. I would assume sliders of a sort.

What do I need to know.. if his tank is too small what size is a good size?
I NEVER wanted turtles, I've always thought they were smelly and dirty difficult to take care of. Please, if you have any good advice and are keeping turtles, show me enclosures!

AND how do you EVER keep that water clean?? I'm very worried because changing aquatic tanks often will be difficult in this cold weather and we don't have a hose.. :[