Aqua K1 Media 25l – ‘Kaldnes’ movable filter cartridge
25 l of moving K1 biofilter media by Evolution for aquarists and pond keepers. Light cubes circulate…
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This moving biofilter insert suits freshwater aquariums, marine sumps and garden ponds where the filter has a media container. It adds a biological filtration surface that lets nitrifying bacteria colonise and reduce ammonia, ammonium and nitrite in the water.
Why it matters
- The lightweight K1 cubes are carried by the water flow, so they keep moving through the available space in the container.
- Constant collisions between cubes and against the filter walls wash off surplus bacteria, which frees room for new bacterial colonies to establish.
- Detached bacteria settle in other media and in the tank itself, extending biological filtration beyond the insert.
- The media also works as a static biological medium, but its movement is what increases its efficiency.
Specifications
- Brand: Evolution
- Symbol: EVO K1 MEDIA 25L
- EAN: 5903900044769
- Volume: 25 l
- Weight: 4 kg
- Type: moving biofilter media (K1)
What it works with
The insert fits any filter with a media container, including external filters, internal filters with media baskets and pond filters, both pressure and flow-through types. In an external filter basket, the manufacturer suggests filling about half of the basket volume. In a marine system, it can be placed in the sump alongside existing media without taking space from them.
Technical specification
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Frequently asked questions
Yes. The media is colonized by nitrifying bacteria, which reduce ammonia (NH3), ammonium (NH4) and nitrite (NO2) in the water. The data indicates that fast growth of these bacteria is what lowers the levels, not just their presence.
It does not have to move. It can be used as a standard static biological media, but its movement in the water flow increases its efficiency.
Any filter with a media container. For ponds, pressure and flow-through filters, including Jecod CBF or UBF or homemade filters. For freshwater aquariums, external filters (about half of the media basket) and internal filters with media baskets, such as SunSun CHJ, Sea Star Turbo or Aquael Turbo.
According to the manufacturer, the floating media does not take space from your existing media, so it can be used alongside them. In a marine sump, it can be added even if you did not plan for it.
For an external filter, the guideline is to fill about half of the media basket with the media. Tell me the filter model and basket size, and I can help you estimate how much you need.
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