I'm gonna try my Zoo Med waterfall kit anyway. I will have the hydroballs on bottom, piece of coarse foam around the pump, pieces of plastic ceiling grid making a platform and slanted for a pool, next will be screening, then coco fiber or orchid bark, and some rocks. That should keep the substrate from getting into the water below.
My question: how to attach the waterfall tubing....to the backside of a background or directly on the glass? I need some pictures to reference.