HELP PLEASE NEED ADVICE

The roots are popping out of the bottom of my bucket
I have and hydroponics ebb flow system set up. SHOULD I ADD MORE CLAY PEBBLES TO COVER THE BOTTOM OF THE TRAY

If you plant to leave them in that system until harvest i say go ahead and throw a few inches of hydroton in there.

Check out my four site hydroponic setup. This might work better.