@ Don, Cheri: I finally went to Michaels and grabbed the sheet moss. It didn't specifically say whether it is safe for animal, but the package did say "not safe for human and animal consumption" (Don't know what it meant but I thought frogs are not suppose to eat moss because it will kill them).
When I was removing her from the tank for during the remodeling job, poor Marshmallow was purple and was very excited when she climb on my arm (probably because that is the only thing she can climb on at that moment w/o sliding down). Then I placed her in a critter holder with a little bit of water to clean her up, and boy was she excited and turned back to green in a jiffy. After roughly 20 mins of hard work, I finally placed her back and and she was as excited as I am because she is free of soil and the moss must be very comfortable.
The tank still look boring, I am waiting for my gf to bring the vines and the fake plants from Hong Kong (her cousin has hook ups for cheaper price). I will post picture when I am done remodeling her tank, for now it is kind of boring. But at least I have one problem solved~~![]()