Lupin;3682266; said:Jcardona is right. I was talking about that particular pest. My choice of treatment is either dimilin or trichlorfon. Trichlorfon is a dangerous chemical though. I have a feeling UK would not allow circulation of this chemical. Dimilin inhibits their growth and it can seep through their shell by destroying it and penetrating their innards thus killing them in the process.
I've pried off a lot of fish lice with my goldfish before. Not a pleasant experience and black goldfish make it worse because I can barely see fish lice scuttling around fin bases and gill areas trying to shield themselves from being found and removed with tweezers. The only reason adults are removed is they require high concentrations of chemicals in order to be eradicated. The meds will have to focus on the emerging juveniles.
thanks for the helpful replies, lup! i was thinking maybe we should pull them off after a few days of treating. we have another pond that we can use after we've pulled the nasty little creatures off. i guess we will try to medicate this week, see what happens then a few days later just pull off anything that are on the fish.
another quick ques: if we pull the argulus off the fish, will this damage the fish? or will they be ok? i mean can the argulus attach themselves on to the fish. they seem to be weak already, last time i could see they were struggling to hang on to the koi when they were swimming against the current.