>>2145571The problem isn't that we don't know how to remove it, it's that it's either risky or laborious.
You can add herbicide but if you mess up the dose you could end up killing all the other plants and even the fish, or you could try to pull it all out and compost it (which would take an assload of time) but because even the smallest fragment can grow back you'd have to add grass carp to eat whatever tries to grow back.
