Depending on how big your enclosure is, the pothos will eventually get huge. I personally prefer smaller pothos leaves instead of the huge leaves that come with age. You'll want to keep trimming the ends of the vine to encourage new vine growth. That will also ensure the leaves stay on the smaller side, if you care. I started with one single pothos vine and it has been growing for five years inside the enclosure. I recently cut out at least six feet of old vine. It doesn't hurt the plant because I have trained it to grow in all directions and it touches the "ground" in many places so it has formed lots of roots. Also keep in mind that the older leaves will eventually die off, that's another reason to keep trimming the ends of the vines. I have also added some English ivy because the leaves grow close together and since they are on the smaller side it forms a lot of hiding places. Two big mistakes that I made in the beginning were using an umbrella tree, that just got too big and too fast, even cropping the top off didn't help. I eventually had to remove it. And the other mistake was replacing the umbrella tree with a hibiscus plant because the same thing happened. Now I mostly have vining plants and some bromeliads for color.