Patent ID: 6982285

Claim:
A process for the preparation of a composition for controlling fish parasites, comprising 0.1 to 99% by weight of a compound of formula (I) or of one of its physiologically tolerable acid addition salts, wherein X is halogen; X 1 is hydrogen or halogen X 2 , is hydrogen or halogen; —O—Y is in position 3, and Y represents the group Y 1 is hydrogen or halogen; Y 2 is hydrogen or halogen; Y 3 is hydrogen or halogen; Z 1 is hydrogen or C 1 -C 3 -alkyl; Z 2 is hydrogen or C 1 -C 3 -alkyl and U is hydrogen or halogen; and 99.9 to 1% by weight of an excipient that is physiologically tolerated by fish.