Evolution Aqua Kaldnes K1
Incorporating Kaldnes Moving Bed™ Process
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.
Design
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 to circulate the media throughout the vessel. This flow is created by pumping air through a perforated circular tube at the base of the Nexus.
How it Works
Maturing the Kaldnes biomedia is important because a delicate ecosystem is naturally developing for the bacteria involved in the nitrification process. Fish are required to generate waste which the bacteria survive on. The bacteria colonise the new media without the need for additional chemicals. When established, your Kaldnes should be brown in colour.
Nitrification Process
Oxygen and food (fish waste) gives the bacteria the means to grow, whilst the Kaldnes media provides maximum active surface area for the bacteria to colonise more than other types of static media. It is this process, which removes harmful ammonia and nitrite from the water.
As the Kaldnes media chaotically circulates within the Nexus, it causes old dead bacteria on the outside, to be removed making space for new younger heavier feeding bacteria to colonise. Within the wheel, is a protected surface, which enables colonies of bacteria to naturally follow their life cycle, maturing and dying, in turn fuelling 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 provides the correct mix of both young and mature beneficial colonies providing a more consistent filter performance, whilst improving water quality, encouraging healthier Koi and aiding in reducing green water and blanket weed.
Maturing Process
The maturing process needs monitoring closely to ensure that levels of pH, ammonia and nitrate are within acceptable parameters for your fish. Usually after a period of between 6-20 weeks the beneficial bacteria will have colonized the media to a satisfactory level to deal with the waste produced by your Koi. This period may extend depending on local water condition, temperature and stocking density.
Self Cleaning
Due to chaotic movement 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.
Kaldnes Main benefits
- Cascade & Evolution Aqua...Kaldnes Moving Bed process creates an oxygen rich environment for your fish
- Cascade & Evolution Aqua...Even distribution of water throughout media (avoids the dead areas within the filter normally associated with static type media filtration)
- Cascade & Evolution Aqua...Old bacteria is constantly renewed promoting new young heavy feeding bacteria.
- Cascade & Evolution Aqua...Many times more surface area than other types of filter media.
- Cascade & Evolution Aqua...Totally maintenance free and self cleaning
- Cascade & Evolution Aqua...Oxygen rich environment gives improved oxygen transfer in moving bed technology
- Cascade & Evolution Aqua...Simply add more Kaldnes K1 media to increase biological filter performance
- Cascade & Evolution Aqua...50 litres of K1 media will handle up to 0.25kg of food per day
Levels of Kaldnes K1 within the Nexus
Kaldnes K1 has been proven in fish farming with feed rates up to 0.75kgs of 40% protein food per 50 litres of media per day. Evolution Aqua is rating it at a maximum of 0.25kgs of food per 50 litres used, in order to ensure the best possible water parameters are achieved. If a higher feed rate is required, extra media can easily be added.
Koi are typically fed at between 1% - 2% of body weight per day. Therefore for every 5 grams of food fed. 1 litre of K1 media is required. At Evolution Aqua, our filter designs are based on the higher rate of 2% per day.