JH Biotech Biomin Iron 1-0-0, 5 GallonsOMRI LISTED. Biomin Iron contains 5% chelated iron which helps prevent and eliminate chlorosis in all of your plants! Biomin Iron is a 5. 0% chelated iron supplement that makes iron readily available to plants with iron deficiencies or chlorosis. Plants that are native to acidic regions may be iron deficient if grown in soils with higher pH levels. Soil levels with higher pH can cause difficulty in nutrient uptake for plants. Biomin Iron is chelated