The Red Hypoestes

My plant, unlike others it seems, has made minimal changes since it has been taken out of soil and placed it's water filled container. It appears to have gotten more stout, but has not grown taller, or produced any new leaves. The remaining leaves however, have lost some of their vibrancy. This baffled me, considering that they should be getting enough sunlight, but probably lack in nutrients. I gathered this because the only plant that has grown quite rapidly actually, have been the roots. This is most likely because they are in search of more nutrients.