The source of co2 has always been a tank with titan regulator and titan controller. I even went as far as replacing both with the same suspicion of ethylene. Although to my knowledge a tank and regulator don’t off gas anything.
Pots are 7gals, watering practices are old school I do hand water but I’ve been hand watering for years with great results elsewhere. Again I’m not the worlds greatest but I am confident with my ability to feel out and know when a plant needs watering.
Nutrients I run are Athena pro line salts at 1.5ec along with cleanse a hypochlorous acid product they have in order to keep the roots clean and healthy.
This is the only photo I have currently of the room but any details needed I can provide. I think it is worth noting this is a basement and there is a furnace, hot water heater, dryer etc outside the parameter of the room.