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Evolution Aqua Kaldnes K1 Filter Media

Sku: EAM100

Key Features

  • Helps to remove ammonia and nitrate
  • Can be used in all types of pond filters
  • Increases efficiency of filters
  • Can be used in moving bed filter systems
  • High surface area to allow for more bacteria to colonise
  • Perfect for use with Evolution Aqua EazyPod and Nexus filters.
  • Provides 500cm2 of Surface Area for every 1m3 of K1 media used


Evolution Aqua Kaldnes K1 Bio Filter Media is suitable for use in mechanical and biological filtration systems.

The Filter Media provides large surface areas for good bacteria to colonise and this increases the efficiency of a box, pressure or multi-bay pond filter.

K1 media is engineered in a wheel shape and has a slight neutral buoyancy. This allows the media to circulate throughout the vessel with only a minimal water flow.

The Kaldness media provides the maximum active surface area for the bacteria to colonise, much more than other types of static media. It is this process which removes harmful ammonia and nitrite from the water.

Within the wheel is a protected surface which enables colonies of bacteria to naturally follow their lifecycle, of maturing, dying and then fueling the latter stages of the nitrification cycle.

K1 is different from other media as it moves within the filter and causes old dead bacteria on the outside of the wheel to be displaced, leaving space for new bacteria to rapidly develop.

Filter maintenance time can be reduced by use of the kaldness media. The K1 is designed to freely move in a filter, this movement causes the media to self clean as it turns unlike foam and static filter media that require removing and cleaning. This self cleaning process allows the filter to be effective without the disturbance caused by regular cleaning as it avoids the unnecessary loss of vital bacteria.



1 Litre - 0.05m2 Surface Area

3 Litres - 1.5m2 Surface Area

25 Litres - 12.5m2 Surface Area

50 Litres - 25m2 Surface Area

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