my plant

my plant is growing very well. After cleaning the roots and placing it in water it has started growing a few centimeters. As the plants grows the bottoms leaves are beginning to die. although the bottoms leaves are dieing it has been replaced by about 7 new shoots that has come out. I have noticed that the new leaves that grew are different in colour than the old leaves. They are lighter in colour. there is more chlorophyll in the new leafs