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https://www.swelluk.com:443/kockney-koi-kk1000-bio-media/ 
Kockney Koi KK1000 Bio Media
Filter Biological Media designed for filter boxes or moving bed filters, increasing your bacterial capacity with a larger surface area.
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This media comes with an extremely large surface area, meaning you can really benefit from a huge bacterial capacity within your pond filter. This will help with the nitrogen and ammonia removal within the pond, keeping the water in the very best quality.
This size media has a surface area ratio of 1,000m2 per m3, thanks to its circular design, giving a huge surface area for aerobic bacteria. KK1000 can be easily installed into a standard biological filter, or moving bed filter, and can be retro-fitted to existing systems to enhance performance as well.
Better bacteria capacity within the system means that the ammonia and nitrite are broken down more quickly, to a less harmful nitrate, keeping the water quality at its very best, and benefiting any fish within, keeping them in the best healthy and appearance.
Sizes available:
- 10 ltrs
- 25 ltrs
- 50 ltrs