Nuraeni, N.; Nurafni, N.; Rismawati, R. Efektifitas Cangkang Telur Ayam Dan Telur Bebek Dalam Menurunkan Kadar Zat Besi (Fe) Dan Kesadahan (Caco3) Pada Air Sumur Di Kelurahan Talise: The Effectiveness Of Chicken And Duck Eggshells In Reducing Iron (Fe) And Hardness (Caco₃) Levels In Well Water In Talise Subdistrict. Jkki 2025, 1 (2), 91-98.