Pond Scum Sucker

My first attempt at a making a pond scum sucker (basically a venturi/injector in a box).

Put your garden hose in the inlet and attach another hose at the outlet for the waste water.

2016-05-24 EDIT: I've just printed this and it doesn't work as intended. I'm in the process of redesigning so please be patient for a working model.

2016-05-26 EDIT: I'm working hard to get a design posted up that works. Currently I have made one that sucks a small amount of water for the amount of water us