Blagdon Midipond Filter 20,000 with 18w UVC

5 reviews

A superb filtration system for large ponds, this Blagdon Midipond Pond Filter is reliable and hard wearing, helping you to keep your water clean and clear for the joy of your fish and those who look upon them. This new filter replaces the 10,000 Midipond pond filter.


  • Midipond Pond Filter 20000
    code: 1010559 In Stock (10+ Available)

Product Information

Blagdon Midipond Water Garden Filtration Systems feature a unique seven stage filtration process that will keep your pond water healthier than many of the other, less sophisticated filter systems on the market. It uses a multi stage filtration process to cleanse the water of all types of grime, odour and pollutant.

The filter includes a UV clarifier, ana a 18 watt lamp is installed. The Ultra Violet light sterilises the algae cells, clumping them together for removal via the mechanical filter media. This will lower the risk of algae problems such as green water.

A removable Stainless Steel Pre Filter stops much of the dirt and debris from entering the main body of the filter. It can be lifted out for easy maintenance, simply wash in pond water to clean. Using pond water retains the healthy bacterial colonies that provide good, natural filtration.

The Midipond Filter has a unique Venturi aeration chamber which allows positive bacteria to thrive inside the filter. These cultures of positive bacteria create the biological element of a filter, helping to break down debris and biological detritus within your pond water, reducing ammonia and nitrite levels to below harmful levels. This device also allows air into the filter to maintain good, natural water conditions.

Water then passes through graded filter foams which remove algae, waste and dirt for a thorough clean. The differing textures of the foam work to retain even the smallest particles.

A further level of filtration is the Blagdon Professional Ceramic Bio Media which allows further colonies of beneficial bacteria to flourish. There is also plenty of room for additional mechanical or biological media such as sponges (not included). Finally, polymer wool media polishes the now clean water, before it passes through carbon impregnated foam which removes any hint of residue, colour/tints and odours, leaving beautifully clean water.

A replacement Filter Mesh Screen is also available. It suits both models and can be removed for easy cleaning as needed.

Key Features:

  • High performance UVC clears green water algae.
  • Spray bar oxygenates water creating the ideal environment for friendly bacteria.
  • Graded foam filter pads remove dirt and waste
  • Ceramic biological filter media prevents the build up of harmful toxins in the pond
  • Replaceable polymer wool pads removes fine waste particles and polishes the water.
  • Carbon impregnated pad removes chemical pollutants.
  • Click here for the larger 28,000 version.

ProductGuaranteeMax. Flow Rate through UVC from PumpMax. Flow RateWattageInlet Pipe SizeOutlet Pipe Size
Pond SuitabilityMax Volume
Midipond Pond Filter 20000 3 Years5,000 ltrs / 1,100 gal6000lph 18w 1 1/4inch (32mm) 3x 1 1/2inch (40mm) 4m (L) x 1.9m (W) x 74cm (D)5,625 ltrs / 1,237 gal

Don't forget your replacement foams and media, to keep your midipond filter in perfect working condition.

Midipond Filter 20,000 Manual

Latest Customer Reviews

  • Rating
    Date 26/06/2020 15:06pm
    Blagdon Midipond Pond Filter 20000
    Feefo Logo
    Prior to purchasing we viewed the Blagdon Midi-Filter, read the product description. the photograph clearly displayed FOUR outlets .. what it did NOT state was that ' Not all Four ' were required.
    Unaware of this we purchased a coil of hose assuming that all four would require a length each .. in fact the unit is working well with two outlets thus we have an abundance of extra hose.
    We would also criticize the length and position of the inlet connector from the pond pump which protrudes ridiculously straight out of the unit. A simple short 90 degree elbow with the various hose diameters would be neater and safer. An elbow was included but with only a single large hose diameter.
    Having written with these two complaints directly to Blagdon we await a reply ...
  • Rating
    Date 16/04/2020 00:04am
    Blagdon Midipond Pond Filter 20000
    Feefo Logo
    Nice it was easy and is now running the pond
  • Rating
    Date 29/06/2016 11:06am
    Blagdon Midipond Pond Filter 10000
    Feefo Logo
    My Blagdon Midipond filter 10000 is up and running. It was fairly easy to set up and now my pond is beginning to clear. I am very pleased.
  • Rating
    Date 28/03/2016 10:03am
    Blagdon Midipond Pond Filter 10000
    Feefo Logo
    Got this pond filter to replace the old one.
    We have not used it yet but everything looks in very good order
  • Rating
    Date 15/06/2015 16:06pm
    Blagdon Midipond Pond Filter 10000
    Feefo Logo
    great value