Do the baskets hang above or into the water?

A customer has a question and I hope we can get some opinions on it, thank

Question. I hv a small grow box. Hydroponics. Do the baskets hang above or into the water ?

Needs to be an air gap so the trunk doesn’t dampen off, or cause trunk rot.
Top feed if you must when their seedling until the roots reach the water.
All you want is the Lil splash of water on the bottom of the net cup and the clay balls will wick the moisture up