Hozelock Trinamic Koi Filter 20000 Hozelock Trinamic Koi Filter 20000

The latest 'Moving-bed' biological filtration for healthy fish. In STAGE 1 a set of venturi introduce oxygen to the water. Then beneficial bacteria growing on the K3 biomedia continuously knock into each other. Only the strongest biomedia grip onto the media. STAGE 2 a series of fine foams remove solids. STAGE 3 water passes through denitrifying bacteria growing on Cypripak biomedia in a dark still environment.

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