The drawback to growing trees in your paludarium

Hmmm pretty cool. I thought the drawback would have been when they out grow your paludarium. Oh and pics are fine I just tilted my laptop to see them upside up
 
What kind of tree is that?
 
...how did a tree catch fire??
Mine came from Lowes, 5 in a pot. All but the one lived. It's now dropping random leaves, one day fine and the next just crispy and fall off. Ugh, lol.
 
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