Water is a vital need for human life, so it must always be available for daily life needs. Therefore, clean water is needed that meets health requirements, especially chemical requirements, one of which is tolerable levels of Fe in clean water. This study aims to test the effectiveness of natural filtration and coagulation using media of "Krueng Baro" coral and shell powder to reduce Fe levels in clean water. The research design was a one-group pretestposttest design. Filters with shell powder media and coral stones were made in the workshop and water quality analysis was carried out in the laboratory. Water samples were included in three treatments: 1) 40 cm of coral and 40 cm of shell powder; 2) 30 cm of coral and 30 cm of shell powder; 3) 20 cm of coral and 20 cm of shell powder. Water was passed through the filter media, then the Fe levels was compared using the ANOVA test. The results of the analysis showed a p-value = 0.012 so it was concluded that there were differences in Fe levels in different media. It was concluded that "Krueng Baro" coral and shell powder proved effective in reducing Fe levels naturally through filtering and coagulation processes.