Yes, if you can drawdown and get to the roots it is fairly easy to thin it out. I have a lot of it and I never touch it. Fish love it and it does not expand or get dense like yours. I hand pull a bit of it if I get snagged in it. I guess I have the right conditions that it does not go out of control like yours. I just keep my electric troller motor away from it.
If I may ask,
What is your intent, complete eradication or just thinning?
Does it ever die back naturally?
Is your entire pond like this or just some areas?
Can you draw your pond down?
