This article discusses submersible pond filters, external pond filters, pond skimmer filters, and waterfall filters for ponds.
Submersible pond filters are just like they sound: they are made to sit inside the pond and hook up to the intake, or suction, side of a pump.
These types of pond filters are excellent for use in formal ponds where hiding an external filter will not work and for preformed ponds and smaller ponds made with EPDM pond liner. Submersible filters often offer mechanical and/or biological filtration and can be purchased by themselves or as a submersible filter kit. Many submersible pond filter kits come with fountain heads and a diverter valve to run a separate water feature such as a pond spitter or fountain. Submersible pond filters can be added during the construction phase of the pond or easily at anytime the pond is complete. Many strides have been made with submersible pond filters. Now, submersible pond filters can be purchased with or without an ultraviolet clarifier (UV or UVC), too. Ultraviolet clarifiers are discussed further down this page.
External Pond Filters
Gravity Pond Filters
External pond filters come in two forms: gravity pond filters and pressurized pond filters. Gravity pond filters sit outside the pond for easy access, easy maintenance, and keep the pond aesthetically appealing because they do not sit inside the pond. These types of pond filters can be purchased with our without a UV and can be relatively inexpensive when compared to pressurized pond filters.
Pressure (Pressurized) Pond Filters
Over the past 10 years, pressurized pond filters have become one of the most common types of pond filters for hobbyists. The ease of adding them to any pond, diversity with regards to location around the pond, and the unsurpassed clarity they provide is hard to beat by any other pond filter. These types of filters can be found all over amazon.com, Home Depot, and throughout independent stores across the country. Most of them backwash, they can be purchased with our without a UV, and they can be located anywhere outside the pond. Even better, the water coming out of the filter can be taken up to a waterfall. The main differences between pressure filters now days are availability of replacement parts and easy of backwash, and effectiveness of backwash. Many filters found at big box stores do not have available parts such as lid rings, replacement foam, and replacement o-rings. Many main stream filters like Laguna Pressure Flo filters are cumbersome and labor intensive to backwash. Some of the pad-less filters like TetraPond and Pondmaster pressure filters are not effective at polishing pond water and are ineffective unless the pumps powering the filters are very powerful.
So, what’s a “good” pressure filter for ponds?
In our opinion, PondMax is an excellent pressure filter that solves all of these problems. Parts are readily available, the backwash feature is easy to perform, and they polish pond water. We have installed several of these in the St. Louis area and customers are happy with the performance and clear water provided by PondMax pond filters. What’s more, they have a high flow rate. Most other pressurized pond filters are limited by there flow rates which means that hobbyists required a pump for the pond filter and a pump for the waterfall. Most other pond filters are limited to half of their capacity with regards to flow rate. What does this mean? This means that if a pond filter is rated for 1,000 gallons, the maximum flow rate is 500 gallons per hour. PondMax stepped up to the plate and designed a filter that can handle a pond pump equal to the capacity of the pond filter. For example, the PondMax 3600 pond filter can handle 3600 gallons per hour. Even better, PondMax filters with the UV option have larger UV clarifiers. The PondMax 7200 pressure filter comes with a 55 watt UV!
Pond Skimmer Filters and Biological Waterfall Filters
Pond Skimmer Filters