They are small little plants that you can glue to whatever you want. You just need to soak them in water every week or two. Not having soil is a big plus. So many things can infest soil, when that happens you usually have to get rid of the whole plant. It happend to me, it was discusting. I disinfected the tank twice before I found out were they were living. Here is a picture of my old set-up. The little plants are air plants, they have some scientifict name I can't remeber.

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0.1 Hypo Leopard Gecko
0.1 Albino Leopard Gecko
0.1 Blizzard Leopard Gecko
1.0 Pacman Frog (Phatty)
1.0 Lovebird (Tony Montana)
1.0 Elkhound (Otto)
0.1 Malamute (Paris)
5.0 Bettas

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