We sell several different lines of filters and we can advise you on what is best for your application.

      In order to keep your pond clean, it is important to filter your water.  Filtration not only helps improve your water clarity to make your pond look better.  It removes fish waste and debris that can be toxic to your fish, and it helps in aerating the water.  Remember that your pond is not a natural pond, with fresh spring water flowing through it.  Your pond is a big aquarium tank, where the water is constantly recirculated. 

     When choosing a filter there are several things you need to consider:  the volume of water in the pond, the site where your pond is located, the amount of fish you wish to stock, and the level of maintenance you want. 

      Start with the volume of water.  If your pond is 1000 gallons, you may get by with a filter that has a maximum capacity of 1000 gallons, but it would be wiser to choose a  filter that has a greater capacity.  This not only means less frequent filter cleaning.

     The site of the pond will increase, or decrease your options.  If you have a formal pond, in a flagstone terrace (and don't really want to tear up the terrace so you can run pipes to an external location) you may have no choice but to use an in-pond filter.  This type of filter will require more frequent cleanings and often when removing the filter to clean a lot of the dirt falls back into the pond.  If you have space around the pond, where you can conceal an external filter, you have the choice of using a gravity filter or a pressurized filter.  Gravity filters need to be positioned higher than the level of the pond water.  Often we place them behind a waterfall.  Pressurized filters can be located anywhere, so you can put them behind a bush or waterfall.


(illustration of a pressurized filter system)

     Now we come to fish.  The more fish you have, or wish to have in the future, the greater your filtration capacity should be.  More fish means more waste but also the need for greater aeration.

     And lastly, we consider the amount of maintenance needed to keep your system working.  As stated above, an in-pond filter is a high maintenance item.  And there is also the issue of taking it out of the water, disturbing the pond, and, naturally, getting wet!  A gravity filter needs the least amount of attention.  We have had customers who clean their filter once or twice a season. Not really recommended but they still do work.  These filters are ideal for people who take summer vacations and don't want to worry about their filters clogging up and stopping the pumps.  The last thing you want to have happen, particularly in warm temperatures, when the fish need the flowing water to oxygenate pond! The pressurized filters are usually easy to maintain.  They should be cleaned on a regular schedule, which you soon become aware of when the flow of water slows.  The newest varieties have a backwash system similar to a swimming pool filter, which makes it easy.

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