We have 2 Fluval Edge 6g tanks but I don't have pic's of them. They have low light but I have Ambulia (which took a bit to establish with low light but dosing liquid carbon daily got it going), Bolbitus, Java Fern Wendilov, Anubia Nana Petite, Micro Chain Swords, Crypt Wendtii. I use root tabs around the Crypt and Chain Swords and for the rest I use Seachem Flourish Comprehensive and API Leaf Zone weekly after WC
A Betta works in them as all you have to do is leave a tiny layer of air plus there is the open center. I have a Betta in one. A Dwarf Puffer would work, nano fish like Scarlet Badis, Chili Rasbora, Ember Tetra's, Clown Killifish, and several others. Or shrimp work well in this set up.
I do suggest getting the sponge cover for the filter intake to help keep the filter media cleaner since it's such a small filter.