This is an extract from the answer Greg Morin gave on APD concerning Seachem iron (http://www.thekrib.com/Plants/Fertil...uconate.html#3
Well, actually the gluconate is a reducing agent in the same manner as
ascorbic acid is a reducing agent (although not as strong as ascorbate).
This question is also answer in question (2) above with respect to the
change in oxidation potential of complexed iron. The additional reducing agents
we employ in Flourish Iron also help to keep the iron in the reduced state. But as I said above, this only prolongs the inevitable, giving the plants more opportunity to to adsorb the iron.
So it seems that you add additional reducing agents to keep it in a reduced state is this a fact and what are this?
Thanks in advance.