oh well no i dont really see the point of doing that cause wouldnt it be like a fan blowing air? Cuz i wouldnt think u wanted that if your trying to keep the humidity up but thats just me, if you want to try it you can
yes it works great especially if you dont feel like making sure the water is a 1/8 of an inch every day. take on of the long flat stone and put it face down in the water with something in it back to hole it down i used to do this with bigger plants in soil in a tray with some impressive results.