HEISSNER Underwater Filters

Space-saving 3-in-1 filter systems for compact ponds and water features

An underwater filter seamlessly combines water purification and aesthetics directly on the pond floor. With the pump and UVC clarifier fully integrated into the housing, you'll no longer have to deal with messy hoses at the water’s edge. This 3-in-1 solution is particularly suitable for decorative water features and compact pre-formed ponds, as it pairs crystal-clear water, achieved through mechanical-biological filtration, with the charm of an integrated fountain.

HEISSNER offers reliable underwater filter systems that are ready for immediate use. These all-in-one units ensure effective water purification while utilising integrated fountains to provide essential oxygenation.

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What is an underwater filter?
Underwater filters are the most discreet solution for pond water maintenance. Rather than connecting multiple individual components, an underwater filter comes as a fully submersible all-in-one set. The pump, filter, and UV pond clarifier are installed in the same housing, often complemented by a telescopic water feature for that extra touch in your garden.

Is this filter right for my project?
This filtration solution is a great choice for:

  • Mini-ponds & basins: Ideally suited for water volumes up to approx. 5 m³.
  • Tech-free zones: Perfect if you want to avoid bulky boxes at the pond’s edge.
  • Water features: For those who want to combine filtration with oxygenation and aesthetics.

Why choose this system?
Thanks to its compact design, you save valuable garden space. Installation is effortless ("Plug-and-Play"), as there are no external hoses to lay. Additionally, the integrated UVC light effectively combats green water (suspended algae).

Tips for operation and cleaning:

  • Location: The filter must lie flat on the pond floor. If the pond is very deep, a simple brick serves as a practical plinth to raise the filter and bring it closer to the surface.
  • Cleaning: Only necessary once the water pressure from the nozzle begins to diminish. Simply open up the housing, remove coarse debris, and rinse with pond water - done!