I have a question about my Vallisneria Italian. I planted alot of these about 6 weeks ago and they are growing and spreading very fast. Some of the young plants, off of the shoots have rooted into my substraite (90% of them) and some have rooted, but the roots are far from my substraite (3' or so). It doesn't seem to deter them because they are grow just fine too, and heading for the surface. Should I let these young substraite-less plants continue doing their own thing and finding their way or should I cut them from ma-ma and plant them ?