I have a sick turtle I'm nursing inside and we recently bought a RES for our outside pond, which we promptly plopped in. We haven't seen him in the two days since we plopped him in, I think it is possible that he took off. To clarify, my dad ran out and bought the RES from a local aquatics store on his day off despite having turtles run off in the past and lacking a decent fence around the pond (it is rather small and he is rather impulsive

).
So, any tips on setting up a low fence around a small (300-500 gallons) pond? Using what we have, I've been placing rocks around to create a 3-5" barrier with surfaces that would make it difficult for a turtle climb. I'm considering putting up a low fence (1 foot or under) in other areas to better secure things and prevent any escapees. Any suggestions on what to look for?