Wow I have to quote myself here and call myself an idiot. I totally assumed you were growing in soil. I don't even think lockout is possible in hydroton haha. I retract my advice and now I think I agree with the rest: watering issue. Hydroton pellets are meant to be used in hydro systems that are frequently watered, several times a day. Maybe you could use some good old passive hydroponics and leave a couple inches of standing water at the bottom of your pot? I imagine the plant would still get enough oxygen to the root zone through the hydroton pellets. Anyone here ever tried that? I think it should work IMO.