I have installed several waterfalls with ponds but no Pondless Falls. I have a client who has had a Aquascape Designs Pondless waterfall built back in April of 2004. It has leaked since day one. He contacted me to see what I can do for him and he is willing to pay to have the entire system taken apart and rebuilt if needed. There is a lot of big stones used in this job and I'm not sure if taking it all apart is the way to go. Any suggestions to finding the leak without doing all this?