Freije Treatment Systems Complaints . I have had repeated failure with the. The epa has approved the following treatment methods for removing barium: Shower Filters Filtered Shower Heads Pelican Water Shower filter from www.pinterest.com The system is good at the two claims it makes: Generally speaking, foul odors at treatment plants originate from the anaerobic decomposition of organic compounds. After about 6 months i ordered two replacement filters.