Check the listing for details. Evolution Aqua K1 Micro Media - Biological Filter Media 1.76 cu Ft K1Micro50L. Condition: New. Listed at 245.99 USD. Evolution Aqua K1 Micro filter media is a high performance filter media that provides a large protected surface area. K1 Media provides protected surface area to boost beneficial bacteria colonization for biological filtration. Each liter of K1 Media will handle up to 5g of food per day. How it Works Maturing the K1 Media bio-media is important because a delicate eco-system is naturally developing for the bacteria involved in the nitrification process. K1 Media provides the maximum active surface area for the bacteria to colonize, more than other types of static media. It is this process which removes harmful ammonia and nitrite from the water.Different from Other Media As the K1 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 colonize. 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 Media has been designed to provide the best possible habitat for both young and mature beneficial bacterial colonies.Self Cleaning Unlike foam, matting, or other forms of static filtration media, the K1 Media is designed to move freely within your filter. The constant, chaotic movement of the air from your pump causes the media to self clean and thus requires no maintenance. This allows the filter to reach optimum effectiveness without the disturbance of periodic cleaning, avoiding unnecessary loss of bacteria within the filter. Award winning filtration mediaK1 Micro borrows from the twenty years of extensive research and development by Evolution Aqua into moving bed filter technology and offers an improvement on existing K1.• 950m2 per m3 Protected Surface Area• Provides a large surface area for bacteria to colonise• Increased protection for the bio-film• Provides mechanical and biological filtration• Reduces back pressure on pumps • Improved solids handling• Increased flow rate • Ideal for use in bead filters, conventional pond filters, marine and freshwater aquarium filters• Improved cleaningK1 Moving Bed TechnologyMoving bed media has many advantages over traditional static bed filters including a huge surface area which is always exposed to maximum oxygen and food for the bacteria, self cleaning media as it tumbles, and the world famous protected surface area, enabling bacteria and higher organisms to dwell in their preferred location inside the media, exposed to oxygen and food, but safe from harmful cleaning practices.Over the last twenty years there has been a wholesale shift over to moving bed technology in pond filters, and Evolution Aqua were the pioneers. No one has much experience or has carried out as much research and development into this important area of biological filtration as Evolution Aqua. Nexus and Easy Pod use K1 and K1 Micro filter media exclusively, and the filters and filter media are all designed and manufactured in the UK.How do I work out how much media I will need for my aquarium?In a moving bed chamber - You would want no more than 25% of the chamber to be filled with K1 as this allows enough water to help it to be fluidized properly.