Does anyone know how or have experience with adding a waterfall to an
already exisiting pool? My issue lies in how to do the plumbing so that the
water can spill into the pool and getting the pool water to the waterfall.

My pool waterfall is plumbed like a return jet from the clean side of
the filter. I put in some base rocks, covered them with pond liner,
added a 3 foot section of slit 2 inch PVC, and covered it with rocks.
Here's a link to a picture..

http://community.webshots.com/photo/...47482540onEVBC

Jim
Zone 8a - Dallas, Texas
Pond, Veggie Filter, Pond Maintenance & Pond Tour Pics:
http://community.webshots.com/user/dallas75248