Hi Jason,
You obviuosly can grow healthy plants, that is why I suggested to do some aquascaping. After all, what else can we do after growing healthy plants, the next level is aquascaping...hahahaha..

...(not to start 'farmer' vs 'aquascaper' debate here..)
May I know what is the few stem plants right in the middle? Bacopa?...
Blyxa as the background plants? As far as I know, Blyxa will not grow high enough for background, normally for middle ground...why don't you add more stem plants at the back?...don't like stem plants huh?..

And one more, NO3 < 0.3mg/l (ppm), quite low?, no BGA problem or browning of plant leafs?
Regards