Hey Mickey..

The follow up is that Superverm works as well as it ever did. Three days after treatment following a number of of microscope slides to confirm, the Flukes were no longer there.
Hell Mickey we only have 5000 galls and still use a Seine net to get them all in one place. I honestly don't know how you would manage with the size of pond you have.
Although it might seem to be the case from posts I have done elsewhere not all the koi in our pond are from Hammock Koi Farm in Tennessee, just less than half of them come from Brady's place in North Carolina.