You know me, I'm usually really good with the offbeat ideas, but tall tanks tend to stump me.
This is a 33 flat back hex. I got it for free from my girlfriend-in-law (bro's lady at the time), and the missus has been neglecting it as her classroom tank for the last year (1 of 15 neons survived.) So she gave it back to me.
The tank is 36" long, 12", and 20"+ tall, with 5" of the front corners knocked off. I'm running a Penguin 350 on it. There is a heater, but ambient in my room is about 80 through the summer. I've terraced it, and there is a good sized hunk o' driftwood. The substrate is complex, ranging from fine sand through half inch pebbles and including several different things good for plants. It's fully cycled. Lighting is an anemic 20 watts, but that will change once I get around to building the canopy (which will require a saw that will cut a 22.5º angle, but one problem at a time.) Currently planted with Wisteria, Vals, Java Fern, and Java Moss. The Wisteria is expendable.
PH and Hardness are going to be what comes out of my tap - just the acid side of neutral, soft, with high carbonates.
Current occupants are 1 Clown Pleco (Mr. Pleakly, my oldest fish), and a bunch of MTS to keep the substrate stirred.
The best idea I have for it at the moment is 2 pearl gouramis, 10 rummynose tetras, 6 paleatus (or similar) cories, an SAE (because this tank is a BBA farm), and Pleakly. Replacing the wisteria with Swords and crypts. No doubt a pretty tank, but I find it uninspired.
Could y'all float me some other ideas? South or Central American cichlids that won't eat my pleco and will thrive in this amount of space. Fish that would work in a Rio Orinoco root ball. Communities based around Oil Catfish or Peacock gudgeons or Betta not-splendens.
I don't have the wherewithal to keep critters than need live (not frozen) food.