Now that I have finally got my waterfall and pond under control, the wife is loving it, so much in fact she says it's way too small and should be made bigger, and deeper for the fish. I would need to dig up the skimmer, and add to the existing liner. What would be the best way to do this? I have some liner tape, would that work as a permanent join? The part she wants to enlarge is at the area of the skimmer and would got out about a 15' diameter circle. I've attached a pic to show where she is referring.