I decided to remove the pump and air-stone from the bottom of the pot. I figured that if I wanted to go hydroponically, I would build a special tank for it rather than try to pump water from the bottom of the container. I think the roots look okay but I'm not a very good judge. After repotting I gave it some kelp nutrients I got for free (what fortune) from Santa Cruz Hydroponics (http://www.schydroponics.com/). I couldn't believe this place was just down the street from me. And to think all this time I had been driving to the city or ordering online for my stuff. golly. I also bought 50 litres of LECA. Maybe I bought too much.