Join Date: Sep 2005
Location: Jakarta - Indonesia
Seachem stuff is stabilized by utilizing gluconate and not artificial chelator (EDTA and the likes) based.
The process involves heating with boiler and a series of metodological mixing. I'd say it is not that easy to make, moreover most of the time you are required to buy a big bulk of materials when you need just a few pounds (or even a few grams).
I speak from a manufacturer-to-be side... making chealted iron that stays stable and has the correct formula to maintain aestetical aspects on aquarium use is not that easy and may take some time of formulating, experimenting and a lenghty testing on controlled subjects. There are individual "working range" for each chelating agent and the nature of whatever raw material you are using is important as well to match that.
I consider myself lucky enough that I've been able to create my own chelated iron-trace mix. Sheer luck indeed to do it in a short time without a team of scientist.
I'd say at the other side of the world you still can get those advanced iron chelate for cheap (esp get some from bulk one from GW). We have to pay almost US$ 20 just to get 250mL of TMG, and that is not so easily since these products are not well distributed.