Money Tree (Pachira) wilting
I have a large (5ft tall) Pachira money tree. I've had it since about July 2011. At first it was doing quite well and growing new shoots and branches. Over the past two months or so it's been wilting significantly and it seems more leaves have fallen off than remain on the tree. The trunks look good, green and firm. Some of the branches and leaves also look good. Many others are in varying states of browning, wilting, or already dropped off.
I don't water it very much, maybe about 16oz of water every week with a little bit of liquid fertilizer. The soil is definitely not overly wet at any time. It's in a 16" diameter pot with the same soil it came with from the Armstrong Garden store (where it looked great!).
As for light, it's in my living room but in a corner away from all the windows. It gets sorta-bright in that room for a few hours a day.
Any ideas? Too little light? Too little water? Too much water?
Thanks for the help!