Perhaps it's a floating plant?

In article ink.net,
"350X_Rider" wrote:
I've got this plant, a non-rooting plant... not sure what it is, got an inch
by accident, introduced the fish I got it with, and 2 weeks later it was a
foot long, floating on top... I buried it, it was 2 foot a week later, cut
it in half, repeated this process for 4 months now, and I've got 14 or so
peices of this plant, that just reaches the top in days...

It sends out what look to be roots, but aren't... runners? but they never
settle into the flourite...

I may end up looking at something different....

thanks for your help....


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"Insert witty comment here."
-John