PCFs are more terrestrial than an actual tree frog and are no longer considered to be in the same group. They are a grass frog, they like to climb, but they don't climb very high off the ground. They also aren't very good swimmers and can easily drown. I made the mistake of giving my first group a water hole that was about 4" long and 4" wide with rocks and stuff to climb on, but I found them all floating upsidedown in the water the next day =( So be very cautious with large water features, a very shallow one that they can sit in and still have their head above water would work for adult frogs I think. I just built my enclosures, it's a lot of fun. I just have to wait to get more frogs again. I've raised over 10 from tadpoles now, but I gave up after all my frog tanks were infested with mites from the crickets I bought from the petstore. I lost 7 frogs, my PCFs and my pacman. Mites are hard to get rid of. I hope everything has worked out with your frogs and your enclosure makes them happy.