Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Controlling Grass

Now that it is hot, my pond is 60% covered in this awful grass.
What is it...and can it be controlled? I'm open to suggestions....please help!
It's no longer fishable as is.
It seems the entire bottom is covered with this grass, and it obviously is dying off and releasing with the heat.
I've manually raked some out, but wondering if there is another option.
the first pic is from raking along the bottom off the pier...one "sandtrap" rake full.
The second pic in the water if just masses of grass that has surfaced.
Please help.

Thanks