JBL MicroMec mini is a highly porous biological filter material made from sintered glass. The special surface and pore structure provides beneficial cleansing micro-organisms with the best possible conditions for colonisation. Ammonium and nitrite are efficiently broken down in the outer layers, whilst the optimum conditions the bacterial breakdown of nitrate are created in the inner section. JBL MicroMec mini is ready to use, in a basket specially developed for the JBL Internal Filters CristalProfi i-series.JBL Filter cartridge MicroMec mini suitable for JBL Interanl filters:-CristalProfi i60-CristalProfi i80-CristalProfi i100-CristalProfi i200