I had a Phal in full water culture for about three years, and it did great. I would just change the water occasionally, and there were no problems. Then, very suddenly, all of the roots in the water died. It seemed like it happened overnight. Nothing I was doing with it had changed, so I have no idea what happened. The plant had a lot of roots that were growing outside the container also, so I just potted it in bark like my others and it has done fine since then; in fact it is in bloom right now, but it was such a strange thing. Something must have happened, but I don't know what it was.
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