I have a 16ftx4ft round pool. The only intake it has is the skimmer. I'm thinking about adding a second suction line lower in the water so that more of the water gets filtered instead of just the top couple of inches from the skimmer. Has anyone done this and if so how difficult is it? I'm new to these forums and not totally sure how to find what i need, so if there is a thread out there talking about this already, could someone please tell me how to get there.