Hey Mate,
actually a good question, which drives me crazy for the last couple of weeks. I'm starting a sort of Bio-Hydroponic System beginning of next year.
But it's tricky. What you definately have to have is a Bio-Filter, which you ink with lots of Bacteria, which should break up food and waste from the plants... i already had some chats about it, also with Harbinger... i think it's possible but the effort to do runs like that will be endless, because you have to maintain your solution very precisely and more frequently than using mineral fertilizers...
maybe you'll have a look for my diary next year😂😜
Good luck and happy trails for the rest of the way 🤞
Servus✌️
OimRausch