Hello i will be making a 5 gallon vivarium to house a pair of PDFs for a few months.I will be getting a 20h as well as the items to fill it in a couple of months.But for now i am in the process of setting up the viv and i thought a pair of PDFs would be fine in there for a while.Ive never owned PDFs so im fairly new to this whole thing.What are some cool begginer PDFs that will be active and fun to watch?Also would 3 or 4 thumbnails be fine in there for their whole lives?Thanks