please help for out wormer

[skyliner34]

hey guys.

i think my discus got out wormer. i had been used Praziquantal for treatment. but it seems does work very well. the out wormer still remain..

Symptoms: 1. scratch the body 2. once eat food it through out.. 3. colour become lighter

i am not sure its Gyrodactylus or Dactylogyrus one of my fish die because of this now another one happen again.

is there any other medication its stronger then Praziquantal.
i used to hear "formaldehyde" it works. but it seems really hard to find in Australia

can anyone please help me for it..

thanks