aquaponics is even better. fish produce waste, which is used to feed the plants, and you get fish and produce from one system. you can even feed some fish the plants you grew.

deadly easy and been around since ancient times.



that is what i was thinking when speaking of UD's system, a complete system
i was also thinking , i wonder what else you could do to have it become an oxygen generator?



well, you could use algae scrubbers - quite easy to do, and duckweed.

duckweed can be fed to fish and can double its mass daily. the amount of oxygen coming off that type of photosynthetic activity would be significant.