On 24/06/2018 09:28, Kipper at sea wrote:
Is there a 100% cure for blankit weed in a garden pond

Yes.
Cloverleaf Blanket Answer.
You really need to know the volume of your pond then mix it up and watch
your pond turn into a pool of milk for a number of days.

I find it best to remove as much weed as possible before dosing but once
dosed it keeps the stuff at bay for the rest of the year.