Use the search bar up top for "humidifier" or "mister". I saw a few posts on this recently. My humidity was at 30% in a 55gallon with the top covered in foil. I added four Dixie cups of moss that was "soaked", two near the hot spot and two on the opposite end. It bumped my humidity up to 50-60% and I can mist morning and night just once to bump it if need be.