Hey Todd,
This is where I found everything I've got on PPS. Here on APC.
http://www.aquaticplantcentral.com/f...tic-plant.html (currently dead link)
I emailed Edward and also PM'd a couple of times w/o response regarding Discus Solution; Mixing 37.12g K2SO4 / 500ml water (listed in the Excel dosing sheet).
Sadly I do not have all of it in electronic files anymore just hard copy.
NPK relationship, Water Hardness (GH,Ca,Mg) pdf, FAQ doc, four excel files including spreadsheets and calculators for formulas and dosing that's it, the rest are hard copy only.
Photo's of the two 75's are sadly overdue but with three grow out spawns of angel fish in the other tanks we're staying busy.

Roughly again about the same when I reviewed the pics posted as I trim every couple of weeks to maintain open water and clean GDA off the glass the tanks haven't changed much. I'll update here hopefully next week.
The use of root tabs has been on and off over the last year adding them maybe twice at the base of the swords in these tanks without seeing much of a difference.
I'll send you the files I have and hope they help.