Dave,

I'm just trying to visualize this. So the end of the hose that is in the jet flow is pointed so that the open end is pointing away from the wall -- that is, it is pointing towards the direction of where the water is going, is that right?. The water jet creates lower pressure around it (the Venturi effect) and that sucks air in from the other end of the hose that is on the deck. Though I can see how this would work by using a focused jet into an exhaust pipe outlet where a "tap" to the side just behind the output of the focused jet would be at lower pressure (i.e. a water eductor), I think that would require something more complicated than what I think you were describing. Have you tried this? How do you control where the water jet is flowing? I tried just using a flexible hose in the jet stream, but it doesn't lower the pressure enough to suck in air (i.e. to overcome the foot or two of water between the jet and the water surface). The hose tends to divert the jet flow so I suspect I am missing something about your description in terms of how you maintain the jet flow to be directed and concentrated so that it flows past the hose end without getting diverted or disrupted. I can see how this works readily in a water eductor that is quite common, but I'm missing something about how the duct tape and hose combination replicated this.

Richard