In my backyard i have a 40 foot stream and pond that was installed in 2006. Over time, the waterfall box had sunk in the rear and was losing water over the back and sides. I knew I wasn't going to have any time to try and repair this myself, so I contacted Pond Care of San Antonio via their website on Friday night, and by Saturday morning I had received a call from Karl Stewart. Karl came out that same afternoon to look at my situation further and provide an estimate. It was clear from the beginning that Karl was very knowledgeable on ponds and pond construction. In looking at my setup, he noticed that the original installer had taken some shortcuts in installing the system, and that since he would be pulling the waterfall box out anyway to reposition it, he would try to go ahead and replumb it the right way (the original installer had simply laid the recirculating water line over and into the box, rather than running the line lower underground and connecting it right into the box). Karl indicated he had availability on Tuesday and his estimate was very reasonable, so we made arrangements for him to come out on Tuesday to do the work. On Tuesday, Karl arrived in the morning and spent most of the day on the project. He completely pulled out the waterfall box, sanded and compacted a new base layer, re-angled the waterfall box to the right position so that it would flow correctly without losing water out of the rear or sides, addressed all of the plumbing opportunities by reinstalling the proper way, improved the layout of the rocks and waterfall, and did some fine tuning of the 40' stream that leads to the pond. He then took time to explain everything he had done to my wife. When I came home to see the repairs, I was totally thrilled with the outcome. Karl showed that he is a true professional when it comes to water features and really knows this space. I will definitely use him again should any other issues arrive with my pond and highly recommend his services.