I see what you're saying. I noticed some of the oldest bases of the ludwighia getting very ugly, i'll replace them with new shoots. The hygrophila ys growing very nice side shoots in every direction, even to the front of the tank. I'm having trouble for the cabomba to root, but i've read that it's a common problem, i'll try to replace the bases with new shoots from the cabomba too.
The sinking tablets i'm using for the corys is made from fish meal, algae, and some other stuff, brand Otto, chinese i think, the funny thing is, every fish loves it! even the gouramis and my betta, i'm having a hard time for the corys to eat that stuff because every other fish wants a piece of the tablets.
Here's a new shot, right after pruning. I overestimate the size of the tank, i don't think i'll be able to cram other species of plants in there, almost all LFS in my area who carry live plants are stem plants or big leaf plants, almost no foregrounders, so i'll leave it at that.
Thanks for your advice FrostyNYC.