ProXL Iron is a trace element that is essential for all plants. It is primarily a component of enzymes and proteins. As one grows with co2 it is important that the plant has enough iron at its disposal.
Use PRO XL Iron only if growing with co2!
With a moderate shortage: 0.75 ml to 1 liter.
With a normal shortage: 1 ml to 1 liter.
With serious shortage: 2 ml to 1 liter.
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