Carbon Dioxide Enrichment Methods

Clutch

Someone hipped me to slow leaks in a bicycle inner tube filled with co2 cartridges. Sounds kinda ghetto, but I think it'll work. Your buds may taste like rubber.

HYDRO

This very quite rudimentry and care needs to be taken
when setting up such.
White vinegar when allowed to drip onto baking soda realeases Co2.
Put a small drip hole in lid and some soda under,only put enough soda untill you find how much you require for a day.
While its only small bursts it can help in small spaces but again I would only reconmend this for those who are able to rig it up safely.
Hope this is of help!