Easy Life Ferro 1L Extra iron when needed FerroEasy-Life Ferro contains easily absorbable iron for water plants. Iron is essential for the good development of plant leaves. Iron ensures that the leaves are green thanks to the creation of chlorophyll. A lack of iron results in the leaves turning yellow, which is known as chlorosis. Ferro helps to prevent this problem. If there are fast-growing plants in an aquarium, then there is a good chance of iron deficiency. In that case, it is recommended to add Ferro to prevent problems. USAGE RECOMMENDATION Weekly :5 ml per 100 litres / 1 fl oz per 160 US gallons raises the Fe-concentration with 0.50 ppm or 0.50 mg/l. Use this recommended dosage weekly to keep the plants healthy and green.