I was just takin a look in there, My tank is about 2 and a half weeks old, mabey three. For terrain I have coconut husk, mixed with Exo terra Forrest moss, The mold is about an inch below the surface and is only on one peice I can see. Iv been misting it every day and keeping it moist. Is that normal ? I think I have some starting on my hollow log proped up against the side of the glass aswell. Is there a way to fix this ? did I do somthing wrong ? Could it be an air circulation problem ?