Al,
Thanks. It is a large tank, two caps is enough for about 80G but the tank is 270G. I might ask him to come every other day just to be safe since there is no feeding.
About Mike, first and foremost it is terrible what he had to go through and then having to euthanize his fish is worse. I know it can be different but it is SO hard not to think about the same outcome. I have not had this issue in almost a decade, it has always been flukes or worms. Always treatable and not this stressful.