Filta midia em i "hat" bilong filtresen sistem, na pefomens bilong em i makim stret filtresen efisiensi na opereting kos. Folem ol samting mo stamba tingting, oli save divaedem i go long tri kategori:
1. Granular filta midia: olsem kwots wesan (sais bilong ol liklik hap 0.5-1.2mm), antrasi (densiti 1.4-1.8g/cm3), i gutpela long ol strongpela samting i pas long wara tritmen;
2. Poros filta midia: olsem aktivet kabon (spesifik pes eria I Moa stret o wankain olsem 1000m2/g), ol i yusim long kisim ol ogen samting na dekalorisesen;
3. Faiba filta midia: olsem poliesta faiba (porositi Bikpela moa o wankain olsem 90%), i gutpela long hai{2}}}ripisen ea filtresen.
Profesenel risets (Journal bilong Envairomen Enjiniaring 2022) i soim olsem seleksen bilong filta midia i mas givim praioriti long intasepsen kapasiti (olsem intasepsen kapasiti bilong kwots sand filta bet i ken kamap long 15kg/m3) na bekwas rijeneresen pefomens (bekwas intensiti i save 10-15L/(m2)).
