Another update,
It seems that where I have sediment wash-in, the CLPW had gone berserk. Other areas of the pond have very little of it. The area with the sediment grows at a rate of ~3 inches PER DAY in 50-60 degree water.
I am going to drop in some grass carp to keep the bushes trim, I would like to keep some plants, just not an incredibly thick mat of the stuff.
So it looks like CLPW likes rich sediments to grow in. Other parts of the pond are basic clay, it it doesn't seem to take hold there.