I've got 3 beardies. 2x4 month olds and a 6 yr old. when there younger, just leave the bottom empty, no substrate. It's much easier cleaning and crickets dont go under the paper towel or other substrate. also, for water i take an eye dropper and gently place a dot on the tip of their nose it will run down their mouth and they should drink it. when they get older you don't really need to worry about hydration because they recognize water.