If you can read German, this is for you!
Today, Google Scholar suddenly (meaning, wasn't visible yesterday) displayed a link to download a German paper (PDF format) from about 2002 meeting of the European Association of Fish Pathologists (EAFP). One article is about how to treat aquarium fish for parasites using praziquantel dosing regimes of different strengths and durations to ensure killing parasites without killing fish.
The paper appears to be sponsored by (or at least has advertisements from) the Tetra company. It's a long paper, about 250 pages. I presume there are multiple articles in the PDF.
If you're interested, here is the link: https://eafp.org/wp-content/uploads/201 ... ondsee.pdf
Cheers, Eric
