Yes, this tank is in my dungeon.
This is not going to be a 'scape', this is strictly a tank to grow plants and do that as efficiently and with as little glitz or $$$ as possible. In fact, the goal of this tank to is to pay for itself and to perform experiments, hence the basement location (also my roommates were getting angry).
In keeping with paying for itself, this 29 gal tank was free. It was my girlfriends corn snake's previous home. It is not ideal for growing plants (40 breeder would be perfect) but it fits in this space and cost $0.
The lights right now are a $0 t8 aquarium hood (new bulb) and a $10 6000k Home Depot LED shop light. I am planning on adding a $40 Sunblaster T5HO next week.
The filter is a $5 Fluval 2 internal sponge power filter which is mainly a CO2 dispersal device and for water motion. There will be no livestock in this tank besides plants.
The CO2 is a 20oz paintball tank with a $40 "Doublesun" brand regulator, plumed into the internal filter. Bubble counter and drop checker, green at about 2bps right now.
Dosing DIY pre-mixed macro solution (KH2PO4 + NO3) and micro (CSM + B) alternating daily.
The tank has been running for about a week but I just got the CO2 dialed in yesterday so I would consider today the "first day".
Most plants were transferred from my other tanks. They are in a mix of substrates, mostly soil and sand. Plant choice philosophy will be mostly things that are colorful yet able to be grown low tech, nothing that will immediately die if it is put in a beginner's tank.
Current plant list is:
Alternathera reineckii 'red'
Some floating Pogostemon Kimberly stems that had no leaves, sprouting a bit now