Bog Filters are known by many names. When Waterscapes says a "bog filter" we mean a system in which water is filtrated through a series of increasingly shrinking rock as well as natural plant filters. A bog works by pushing water from a retention pond or other water source through a small porous rock layer, then a larger porous rock layer, then through gravel and finally through marginal aquatic plants such as reeds. By passing through so many layers, the water is naturally filtered reducing, if not removing the need for any chemical treatments of the area. Many states are starting to move to a more eco-friendly environment and reducing the amount of chemicals a retention pond can use. With a proper sized bog filter, chemicals are no longer needed for general cleaning! Wouldn't it be nice to know that you can have a large scaled water feature without worrying about how much you are affecting your surrounding environment? With a bog feature you can! Call us for more information. We'd be happy to discuss with you any questions you might have about large-scale bog features.