I dosed the second lot again. This time I shook the bottle till my arm got real sore, then added it to a jug with tank water, poured it in the tank and it made a milky effect for a while, so I am sure a much better dose. The only problem is I left the skimmer on, but I had opened it right up, so the level was very low, but it still had a white head from the prazi, so I switched it off, and ran water back through the skimmer to get the water back in the system. I thought let me leave the skimmer on to create oxcygen, but was a mistake.
The emperor had some real strong shaking fits again, so hopefully I hit a lot more flukes, or the rest of them. I will dose again in a week.