Pond Filters

We have a beautiful pond on our church property. It has a lovely gazebo on one side and adds to the property value. However, every year people from the congregation have to go out into the water and clean the pond. I checked into the Internet and found that you can get pond filters that will do a great job of keeping the pond clean. It would sure save a lot of work for everyone. We will have to investigate and see what kind we need.