oh ok i understand what you mean now..i didnt quite get it before but i understand now. if i do decide to get a waterfall unit ill deffinately check that out...

soo..since i got the cork background they said if i used a small pump i could run a tub up the back of the background and make a hole in it so the tube could pump out water..if i did that..would i need a little basin of rocks under the place that the water was falling down? like trickeling down the cork and onto a pile of rocks? would it just run down thru the soil/cocoa husks and hydroballs and be sucked back up again just like that?