DIY CO2 Production With Beer Fermenting Off Gas
So, I've got this crazy idea. Couldn't I use the CO2 released from the fermentation of beer to CO2 Dose a planted aquarium. I have a 20 gallon long, that I've been thinking of doing a low tech iwagumi el natural tank with a beta, a small group of (3) pencil fish and a small shoal (5) of neon tetras, and have some shrimp (4 or 5) in the bottom as well, most likely crystal red shrimp. The way I imagine it going down is this, I have to keep a near constant production of beer to try to keep things mostly stable regarding adding CO2. I'm looking at an El Natural approach (potting soil and Sand for the substrate), with a dsm for some HC and Dwarf Hair Grass. When I flood the tank, I can boost up CO2 with the CO2 from the keggerator, until the plants acclimate and can live on the fermentation CO2.
Does anyone see any issue with the CO2 released from beer fermentation opposed to other DIY CO2 methods?
Any Issues with the fish pairing? Fish and shrimp combination?
What would be the minimal amount of light I would need? I'm looking to put this in a window that gets some light, just not a lot of direct light except in the afternoon during the summer.
Lastly, is this thought completely insane?