Or you can grow spirulina or other microalgae which is much more efficient at converting CO2, and at absorbing the available sunlight. I believe you need about 5 m2 of southern facing window in a bioreactor that is 6 inches deep to convert the 1 kg of CO2 that a person creates. Can't find the citation sadly.
I'm casually experimenting with this too, to improve AQ in my home office. Do you recall the surface area in the 6-inch-deep bioreactor (or total volume)? The only hard numbers I've found are from the Russian BIOS-1,2,3 experiments, which suggest 18L/person of Chlorella will 75-100% compensate for a person's CO2.
I have 18L of Spirulina, which appears to be having some effect, though not anywhere near a complete offset. Though, my setup is quite sub-optimal, and I've seen articles that suggest Chlorella is a couple times more efficient at biofixation than Spirulina. Continuing to tinker :)
