I have anohter one of those round, sperical vases... with about two inches of sand/peat, with an average of maybe... .5cm, maybe less, water across the surface... The temps stay around, uh... I'm not sure... Lowest is around 60*F at nightime, but Its warmer during the day... Uuum. actually, they don't get a load of sunlight... It is on my desk, infront of my window, but its behind one of my larger neps (the pot that is), and so its fairly shaded... Its growing quite well...