I went in and pruned it. This will hopefully not require CO2 at all. The plants will be limited to Crypts, Java fern, Java moss, and Anubias when I get some. Right now there is about 25-30 watts, T5 6000k. I'm dosing some ferts, mostly nitrate because the low bio load right now there is none. Substrate is gravel in varying sizes over the top of some cat litter and mulm from another tank i broke down.
currently the occupants are 8 ember tetras and a 2" vampire shrimp (Atya Gabonensis) and soon I hope to add about 6 threadfin rainbows and a pair of either peacock gudgeons, or Goo Obo gudgeons, whichever my fish lady can get.
It desperately needs to grow in, and I know there are a few "voids" that I will fill in soon. I see a choice spot for some Anubias Nana already. I'll update as it progresses.
specs are in the first post. the moss is Java moss. the heater is a Visitherm stealth, i think 150 or 200 watts, can't remember. i got it for my old 45 gallon that i tore down, and its the best looking heater i have, so i threw it in this one.
To deal with sealing the top, I am considering switching from HOB's to a couple powerheads with sponges on them. that way I can just have a solid lid with a small hole for the cords.