Sometimes the new pond owner may not realize that the pond isn’t operating as it was intended. This was the case with Tony,s pond. He called to see if we could make the pond look or work better at the new home, he had purchased. It didn’t take long to diagnose that this pond along with its filters hadn’t been cleaned in several years. After draining and removing the fish, we were amazed that it worked at all. The sludge was so deep that the bottom gravel wasn’t even noticeable..After a day long cleaning , Its good as new. The fact that this pond was even working , before the clean out ,testifies to the fact of a working eco- systems results. How often do you clean your pond.