... 5.Long life Addlinn's household water filter L2L2 Can adsorption halogen, oils, color, and odor of metal impurity,remove impurities ... , oils, color, and odor of metal impurity,remove impurities particleFILTER CORE LIFEAccording to differences of water quality, filter core life ... , but can be used long term by replace the filter core.(See instructions)MAINTENANCE RECOMMENDATIONSBackwash once a week, at ...