Things You'll Need
- Aquarium iron (sometimes written "Fe") test kit
- Plastic cup for mixing
Instructions
Mix powdered iron with water in a separate container. Follow the manufacturer's instructions. This step is not necessary for liquid iron supplements.
Add one to two drops of liquid chelated iron per gallon to the aquarium. Again, follow the manufacturer's directions; if their particular brand requires a higher or lower dose, comply with that.
Test the iron level of the aquarium after five minutes. You are looking for an iron level of 0.1 mg/l. If necessary, add more iron to the aquarium.
Monitor your aquarium. If the plants are becoming yellowish, with yellowing from the tips of the leaves, they do not have enough iron. If algae starts to become a nuisance, there is too much iron.