I'm trying to learn as much as I possibly can about growing before I decide to grow. One thing I can't decide is whether or not I want to try an aeroponic setup or regular soil. I have a couple questions..

1. How often does the water need to be changed in a res?
2. What will produce a higher yield? I'm not looking for crazy numbers but the more the better.
3. Would one be better than the other if growing in a small area like a closet?
4. Overall which would be cheaper?