I bought a Dumb Crane at Lowe's. I took it home and re-potted it. It has three small trunks and I put it in an oversized planter and put regular potting soil that comes in a bag to fill the void. Two an a half days later the very bottom leaf on all three trunks have turned yellow. I have added about 8 oz. of bottled water at room temp. to it. What has happened and how do I save the rest of the plant? Should I trim these leaves off, water more, move the plant in the home? I don't know what to do. Please respond ASAP as it is getting worse by the day. Thanks Mike