newb here, just built 2 terrariums for some neps, darlingtonias, rubras, drosera, and flytraps. *Went in head first, without enough research. *Didn't leave them in pots,(I know, I know) * have about 2 inches of gravel at bottom and then about 3-4 inches of sphagnum moss. *What I'm wondering is how much water is enough or too much? *Should there be water at the bottom in the gravel for roots to reach? *any input would be much appreciated.