Yah, ask Randy Holmes-Farley. He loves my scientific ways.
It is a 20 breeder, with a 45 gallon bin type sump. I moved so it is a hodge podge so that I could have something.
From Ebay.
Something like this:
Here is 500 grams of high purity Iron, reduced powder. It is 99.9+% pure and is approx. The powder is shiny and in excellent shape. ZERO OXIDATION! Good luck! This is for laboratory and scientific use only!
www.ebay.com
Mine is American Heritage industries.
I have an ICP test sitting and I need to get it going. We'll see if I am really doing anything. Like I mentioned before though the goni visibly responds to my additions.