you shuold see the guppy grass that i cleared out last week
its odd alot of the water wprite has roots growing off of the stems its like a tree i know of a hybrid poplar they do that you just cut off a branch and stick it in the ground and next thing you know you have a new tree they grow over 1' a year sorry al that is of subject
if it doesnt block any light then you can leave it be for a while. But if it is blocking light/tops melting from the light, then you can give it a trim and replant the cuttings.