fish scratching what are the parasites that cause this ?

[hottuna]

it cant be ich @4 weeks of copper...please dont say flukes-as that is the "standard" answer for everything that cant be explained on here...
protozoan? some copper resistant ecto parasite?
tried treating with delos by natl fish farm-nothing
then tried quinine sulfate-nothing
gonna try aquapro cure by fish vet next....with acriflavine & formalin...
my qt is bare- just 2 hob filters and some pvc pipes to hide in...
is there a new strain of something we have no cure for ???

 

[Ohiomom]

to me it sounds like you may have just irritaded your fish with the different medications. If you see no outward sign of disease stop dosing and do a huge water change..give them a chance to recover and see what happens..slow down. You can very well kill them from over medicating..hth

4 weeks of copper is really long imo..

 

[hottuna]

JHemdal offered some very helpful thoughts on this...
i'll post further when I know more...