Nano polo polo e mafai ona pala ma mitiia le ammonia, nitrous nitrogen, hydrogen sulfide ma uamea mamafa, ma e iai uiga o le "multivalent cation", lea e mafai ona faʻaleleia ai le malosi e faʻafefe ai siama nitrifying, faʻavaveina le tuputupu aʻe o microorganisms, lelei ma vave faʻaaogaina le aafiaga. o fa'asalalauga fa'amama, ma fa'atūina se vaega o siama fa'amanuiaina.