This is a discussion on API Leaf Zone question within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; -->
I know on the bottle is says to only dose once a week, but is it okay to dose more than that? Would it ...
I would not use it more often since iron (a heavy metal) in high amounts is toxic to fish and it can aggravate phosphate deficiency (iron precipitates phospates).
I would not dose Leaf Zone at all unless I check iron level (Seachem Iron test)