Pond Filters are generally required to keep a Garden Pond or Water Garden healthy and clear. A Koi Pond requires more filtration than a Water Garden or a Goldfish Pond due to the large mature size of these beautiful pond fish.
Effective Pond Filters combine mechanical and biological Pond filtration. Biological Pond filtration involves beneficial bacteria to break down fish waste and other organic matter. Mechanical Pond filtration traps particles in some type of filter media for later removal during cleaning. Good Pond Filters accomplish both and can be fitted with ultra violet clarifiers for algae control. It is best to choose an out of the Pond Filter for ease and convenience when cleaning or servicing the filter. Some Pond Filters must be installed at the highest point of water discharge, but pressurized pond filters can be installed at any level because the force of the water exiting the Pond Filter is equal to the force going in.
The Pond Filter must be sized correctly to insure effective cleaning and purification of the water. Water Gardens and Goldfish Ponds should be filtered at the minimum rate of one half the pond volume every hour. Pond Filters for Koi ponds should be sized more generously. A Garden Pond that receives full sun (six or more hours a day) also needs a more generously sized Pond Filter.
Many different types of Pond Filters are available: Skimmer Filters, Biological Pond Filters, Mechanical Pond Filters, Waterfall Filters, Pressurized Pond Filters and now also several lines of Back-Flushable Pressurized Pond Filters.
