Looks interesting. I'm wondering how I'm gonna convert my marinade tank into a aquaponic system. And which plant to place and how

Should work, if you choose the right plants. The only concern I have is for the fish--It doesn't look that easy to get a filter on there. You'd have to cut the plastic, and a filter is a must even with plants to keep the tank cycled (be SURE to read about the Nitrogen Cycle for fish if you don't know it--It is ESSENTIAL in keeping fish alive and healthy) and the water oxygenated. It will also keep water flowing through those plants.

Where does the hose to sprinkle the plants go?

Hey I'm looking at doing something, I am wondering about not having to pump the water up to the plants, can I not just have the roots dipping into the water? all of the large scale systems I've seen have the fish in a separate tank.. Whats the reason for that?