I have my Lucky Bamboo in a fish bowl, with a fish. The fish has been living well, it is a beta, and I am certain there aren't contaminates in the water. The bamboo had to survive a shirt trip through the cold to get here, where it is now. I noticed one of the four stalks leaves were lightened, leaning towards yellow or lime. Another stalks leaves has began lightening, and the base if the stalk is whitish now (the roots are all orange). Is this normal? Could the bamboo be in too much water? It is next to a window that is consistently covered by a curtain. Should I move the plant away from the window, in any case? the bamboo stalks are submerged at different levels and some are larger, but the largest is fine and under the most water. The stalk that has turned light at the base and it's leaves is the next largest, and slightly less submerged. Size and submergence fallows. The deepest is about three inches.