<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.ikiwa ni unga mwembamba wa kaboni iliyoamilishwa, inahitajika kuongeza kiwango kinachofaa cha diatomite kama msaada wa vichungi, ili kuzuia kiwango cha mtiririko polepole sana.  <response>: if it is fine powder of activated carbon, it is necessary to add appropriate amount of diatomite as filter aid, so as to avoid too slow flow rate. 