That is really beautiful! Discus are not the easiest fish to keep, if I remember... So you must be doing everything right!
I wish I could have a large tank. I know from having the smaller ones that a larger one would be to much for me, no matter how much I would like it!
I don't know if we will get a forum just for planted aquariums because there is not that much interest here.
It's nice to see another tank posted here!