I really wouldn't. You can bake it, fry it, bleach it and I still don't think you would get rid of all of the nasties. Its very tempting, but if you have species which are not indenginous to North America I don't think it would be a good idea. There are species of trees which have toxic wood, and pine trees leak sap even after the brach has fallen. If your comfortable with it then do it, but I have seen frogs die from people doing this at my hospital.
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4 Whites Treefrogs (Gleep, Gloop, Gazoo, and Mrs. Chubs)
1 Red Eyed Treefrog
2 Bearded Dragons (Butterfinger, B.B.)
2 Argentine Horned Frogs (Endeavor, Mcfatfat)
2 Betta Splendins
12 assorted freswater fish (and growing)
2 Koi (peppermint, mr. winkie)