tinker, So right now for hydroponics, I'm using Masterblend nutrients, but I would like to close the loop on that.
There's aquaponics where you raise fish (even for eating) and use the fish waste as nutrients for your plants.
Here's a paper for using human urine to develop nutrients for hydroponics: https://doi.org/10.1016/j.eti.2021.101708
Here's a link on SciHub if you don't have a subscription to Elsevier: https://sci-hub.st/https://doi.org/10.1016/j.eti.2021.101708
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