Yes I noticed iron#1 become a favourite among people building their first fountain. I can understand why ? the ingredients are easy to get, and the formula is very simple. I would imagine that with trintri Iron the effect is rather disappointing, because you really need a much coarser grade for this to work nicely (about 60#). However, I expect it to look much better with AL #200!
BigG - you're right it was a re-hash of #1 - forgot to mention that - plagarism is something I stay away from.
My first fountain was 85%BP, 15% Pine Charcoal #60? That was long time back. Got much nicer formulation now Anyway ? for driver 85%BP 15% Pine Charcoal #150 works well. Together with your formula in the bottom half of the driver ? you can get a nice basic two stage effect