Your tank is looking really neat. I'm trying to do a similar but simpler setup with some plants just growing out of my filters and some vines in the water, and it's coming along well, but my tank is smaller and has little supplementary lighting outside of a nearby window so my options are limited.
Also, for me I find hypoestes does really well outdoors but dies almost instantly inside. I had some that grew a few feet tall this summer and even bloomed in mixed planters with some other flowers in the shade of an apple tree, but toward the end of summer they got a bit leggy and the frost did them in last night. They're good annual flowers, but poor houseplants.