@MissSkittles The biobags do leak. I wish I wouldn't have purchased one. I am urrently using it my bioactive setup and the bag is way too small if your enclosure is 24 × 24 at the bottom. There is so much unused space with the gap (it's bigger than 1 inch around as it was advertised). Feces, leaves, insects and anything else can get in the gaps and sit on top of the moss (or go down into it) almost making a bioactive setup pointless. I hate the look too because moss in the gaps is messy. I did use a drainage layer at the bottom.
I am waiting for the order to come with the supplies, but I am redoing the bottom of my enclosure because I hate the bag so much. If you use it, I hope that your experience is much more positive than mine.