My Chara floats up to the top when it starts to die off. I had about 30% surface coverage of a 3/4 acre pond just before Hurricane Ike. With the high winds/waves I have no more surface Chara...its all up on the banks.
Mine is also very thick even in 7 ft water. It seems to keep the water very clear and I get 4+ ft visibility. I am getting some Triploid GC from Overton in early Oct.
I have not tried any chemical control this year. I use well water or falling rain to keep pond level up...I get no runoff due to banks 2 ft higher than surrounding land.
