Does anyone have ideas on how to make a pond skimmer (something simple for an already installed pond). This can be a simple floating skimmer if possible. I have seen many on youtube and other videos. The problem is, they never show how the pump attaches. It seems to me that if the pump attaches to the inside of the skimmer, without holes, it won't draw in water. With holes, it won't skim. So where am I going wrong in my thinking? I would like some sort of pic on how it is put together if possible. Thanks