Do you want a planted tank?
It's by no means necessary, and you're already running a fair amount of nutrient export. GFO, carbon, skimming, dsb, and macro is not a simple operation. IMO it would be better to slow down, learn how to test your water properly and do some more research. Just see how your tank does. The risk is that you'll end up with a complicated system where you don't know what, if anything, is beneficial / detrimental.
I'd get straight on the basics first, the $1/gal sale happens a few times a year.