K1 Micro Bead Filter 20 20″ Diameter For ponds up to 18,000L (4000 Gal) K1 Micro Bead filtration systems are a range of pressurised filtration systems that deliver incredible levels of filtration for ponds. By using the new K1 Micro filter media instead of convential beads, these filters offer better biological and mechanical filtration. This is due to the vast protected surface area of the K1 Micro filter media (950m2 per m3). This protected surface area safely houses friendly filter bacteria and prevents them from being flushed to waste during cleaning cycle. Only dead bacteria, waste debris will be discharged. This results in no Ammonia and Nitrite spikes after maintenance. The K1 Micro Bead filter has been designed to allow an unrestricted flow of water through the unit meaning a lower wattage pump can be used saving you money. All in all, the K1 Micro Bead filters offer unsurpassed mechanical filtration, tremendous biological performance, saves you money and can be installed on any type of installation.