Kaldness filter media

Kaldnes Moving Bed™ process, which has been scientifically tried and tested in fish farming and waste water treatment for over 10 years, is now available to fish keepers and is exclusively distributed worldwide by Evolution Aqua and their authorized dealers.

Kaldnes K1 bio chamber

Developed by Professor Halvard Odergard at Trondheim University of Science and Technology the Kaldnes Moving Bed™ bio film process has been designed specifically to create the most effective environment for the nitrification process to take place. The media is engineered in a wheel shape and is slightly positively buoyant, allowing a small amount of water flow (created by adding air to the process) to circulate the media throughout the vessel.

Oxygen and food (ammonia and nitrite) gives the bacteria the means to grow, whilst the Kaldnes media provides maximum surface area for the bacteria to colonize and produce bio film. It is this process, which removes harmful ammonia and nitrite from the water. As the Kaldnes media chaotically circulates within the bio tank, it causes old dead bacteria/bio film on the outside, to be removed making space for new younger heavier feeding bacteria/bio films to colonize. Within the wheel, is a protected surface, which enables colonies of bacteria to naturally follow their life cycle, maturing and dying, in turn fueling the latter stages of the nitrification

conversion process. It also assists in the breakdown of any small particles passing through from the mechanical stage. Therefore, the Kaldnes media maintains both a young bio film and a maturing bio film providing a more k-1 media consistent filter performance, whilst improving water quality, encouraging healthier Koi and aiding in reducing green water and blanket weed.
Due to chaotic movement nexus filter of the Kaldnes K1 media, the process is self-cleaning and requires no maintenance. This allows the filter to reach optimum effectiveness without the disturbance of periodic maintenance, avoiding unnecessary loss of bacteria within the filter preventing high levels of ammonia and nitrite within the water.
The other major benefit of Kaldnes K1 media™ is the huge 'active' surface area available for the bacteria to grow on compared to other types of media. This feature allows for smaller filter design while providing increased biological efficiency.
Kaldnes Moving Bed™ Technology is included with Evolution Aqua's filtration products, the Nexus line, combining both mechanical and biological filter in one compact unit.

Kaldnes media can be used in several types of pond filters, including those built yourself.

KALDNES MEDIA
MEDIA	K1	K3
Total Surface Area	800M2	584M2
Totsl Protected Surface	500M2	500M2
Performance Rating	*****	****
Price per 50L	$104.00	$97.00

How it is different to other media?

As the Kaldnes media moves within the filter, it causes the old dead bacteria on the outside to be displaced. This makes space for new younger heavier feeding bacteria to rapidly colonise. 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. Kaldnes has been designed to provide the best possible habitat for both young and mature beneficial bacterial colonies.

Below is a table to help you calculate the amount of K-1 media required or maximum stocking densities:

Amount of K1 Media in Nexus	Maximum Daily Feed Rate for the Nexus	Maximum fish stocking weight depending on the Nexus the Nexus percentage of body weight fed daily:
Health and Growth Rate		1% body weight	1.5% body weight	2% body weight
100 litres	500g of food	50kg of fish	37.5kg of fish	25kg of fish
150 litres	750g of food	75kg of fish	56.25kg of fish	37.5kg of fish
200 litres	1000 g (1kg) of food	100kg of fish	75kg of fish	50kg of fish

Typically, koi are fed at between 1% - 2% of body weight per day, so for every 5g of food fed, one litre of K-1 media is required.

Kaldnes can also be used as a mechical filter medium, we have tested this premise here and the results are very good - great for trapping fine particulate which makes for clear water, easily cleaned, no channelling, additional benefit as extra bio filtration.

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Kaldnes Biochip

Kaldnes K3