2 Basic Questions

[Tabasco]

I'm just getting into this myself.
The answer to the total off grid question is yes.
https://www.ctahr.hawaii.edu/hawaii/down ... ettuce.pdf
It is all over Youtube to see, it does work.

I see very little wrong with a non-circulating system.

No soil contamination to deal with
Never need to water
Totally off grid
Very inexpensive
Fast