Hey Jpap
You'll be better off getting a glass top and buying a 65 watt compact florescent fixture and just running a 55 watt in it. That will give you 1.8 wpg. The ballasts run either.
You won't need CO2 or you can supplement with Excel. I recommend buying the 2 liter bottle.
As far as ferts the bioload/feeding should take care of most of the needs. You might need to add some KNO3 once a month to get the levels stable. Also buy some flourish comprehensive for trace ferts, I dose 5 ml a week.
Look at my sig and you'll see my tanks. The 55 I treat as I described to you. The 75 gallon is a totally different ballgame but the same wpg. The slower growing plants like you have and in my 55 don't go thru the ferts as quickly.
As for UFG/RUFG I have no idea but with the replanting I do I could see where some of those plants could block flow in the plates. Mostly the Vals and Crypts.