I already have the bricks of eco earth that you add water to, I let it dry and its a tiny bit damp, mine seem to be okay with it. Where do people buy the moss for frogs? We have pet supplies plus, petsmart, and petco. The box stores don't sell it, so I used eco earth thinking it was the next best substrate. I had sand before but it really made cleaning the tank alot harder. I am looking for a flat tray to fit in my aquarium so I can make land bigger. I just hope my substrate is adequate since I can't find the moss.