We have a large koi pond with a waterfall. It has been losing water for a few months. We had another company come out to clean it and they thought they found the source of the leak in the process, but they didn't. Sublime Water Gardens found the problem quickly. There were many roots growing into one part of the pond, pushing the liner away and causing water to leak out. Cleaning out the roots took about 3 hours. The leak detection cost per hour was pretty steep, but it was in line with what other companies charge for the same service, so I suppose that's just the norm for the industry. The other company who cleaned our pond didn't reshape the rocks around the edge that had fallen down, which was kind of a disappointment. The man from Sublime Water Gardens told us that they do reshape the edge by placing the rocks back where they belong as part of a pond clean out. Next Spring, when it's time to clean the pond, I'll definitely call them to do it, rather than the other company who cleaned it last time. They were pretty punctual. The receptionist told us they would be there around 8:00, and they were there around 8:40, which isn't too bad for contractors. They were very professional.