Think I'll keep an eye on this thread Sam, similar size tank to me, and I'm just doing Plant Nutrition without EI at the mo. When the lights are sorted out in the next couple of weeks I'll have about 2.8WPG, so could see problems there.
I can't see any Bacopa Monnieri or Caroliana in your tank tho!!! Unless my IDs are wrong. From the plants I got (of which I think I have both) Monnieri is like Carolianas smaller brother I have them next to each other. The leaves on mine get really dirty, really easily, I think they are the Tetras toilet plant.
I like the look of your tank, though.
Looks like we're gonna be competing for who can produce the most algae here.
Andy
EDIT : Looking again at that plant, the lower leaves do look like Bacopas, Do Bacopas produce different leaves when under higher light?