Do I really need a air stone? I have a bubble wand, airline tubing, and pump and whatnot, but do I really need the wand? I mean I use it sometimes, it looks nice, but couldn't I just hang the tube into the water? That's what I'm doing atm, as I got rid of my little filter waterfall (dad complained about noise) so I'm just using the pump to agitate the water a bit more. Will post pics in morn.