What is the name of this plant?

    I started a plant tank 4 months ago here in my office.
One of the plants I purchased was listed as a Rotala Indica
in the shop.  The leaves were quite round and green.  After
planting the shoots, however, the new growth was quite 
different.  The leaves were more elliptical and those near
the surface are a dark red color.  I have read that plants
will have different forms when permitted to grow out above 
the water but was not aware that this would happen for all
of my new growth.  Is this the result of special lighting,
etc. used by the growers/shippers/wholesalers of the plants?
Do the characteristics of this plant sound consistant with
rotala indica?  Thanks in advance for any help you can give.