Hmm Thats interesting but wont the water become dirty very fast, how do you filter something like this?
Why would the water become dirty quickly? RCS make little waste (hence why tanks can hold so many without issue) and the bowl is planted. I probably will not feed the RCS either since they should be able to sustain themselves on what is in the water and on the substrate.
Now if you are posting of algae, then yes, that is a concern. In the end, this project will be a good learning experience for me.