It's rooted.

It was getting dark but heres a few photos

How much is a "good" amount? It has been spreading slowly. I have grass carp but no tilapia this year. I first noticed a small patch last year that was maybe 1 square foot. Cutrine Plus doesn't seem to have any effect on it.













"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen W. Hawking