It's my emotional support vat of algae. I keep it in my bed.

If I am remembering the same video, he had like 4 five gallon containers. You can hardly call that a vat...

And you're just going to trust us to find the video ourselves?

There was research into algae to make fuel, started during the arab oil embargo, killed off by big oil, then exxon eco opted it and made sure it went no where and finally just killed it. But the national renewable energy laboratory has a bunch of strains at cost. The best strains mysteriously disappeared from the university of hawaii that is holding them.

Well there is no forced air. There isn't really any variables to have anyone look at. Short of sawing a hole in a wall, door or window.

According to this calculater:

• 400 ppm CO₂ in air would be about 0.72 g / m³
• 3000 ppm CO₂ in air would be about 5.40 g / m³

The room is about 20 m³ in volume. So in total that's 14.4 g to 108 g in a night. Ignoring any that diffuses under the door into the hallway, this would imply I breathe out 93.6 g of CO₂ in 8 h at rest.

A common number I see online for adult humans is 1kg per day. Makes sense that a significantly higher than proportional part of that is during waking hours, so I expect quit a bit less than 300g at night. Seems pretty plausible to me all-in-all.

6 Normal size snake plants can produce enough oxygen to keep a single human alive fyi