Try getting some cheap fast growing stem plants like water sprite. They may help suck up a lot of that extra iron. Then begin to add more exciting plants later after the water starts to clear.
Just another thought here but if you want to grow plants in that tank I don't think you have enough light. Judging from the pictures those 2 desk lamps will not create enough light for most plants.
I guess you can't really see it from the angle of the pictures, but I have a "48" Deluxe Fluorescent Aquarium Reflector" 40 watt and "those desk lamps" I rewired and each hold 150 watt incandescent bulls and there are 3 of them, not two.