This is for aquarium usage so I think would cost a fortune for a pond.
The main ingredients are Acriflavine and Malachite green. Composition: 9-amino acridine hydrochloride 105 mg, acriflavine chloride 600 mg, ethacridine lactate 3375 mg, malachite green oxalate 79 mg, aqua purificata ad 100 ml.
The info says it
"combats the most common ornamental fish diseases: Bacterial infections, fin rot, fungal infections (Saprolegnia, Achlya), skin slime (Costia, Chilodonella), Trichodina, Oodinium, gill and skin flukes (Dactylogyrus or Gyrodactylus), skin injuries and wounds.
I doubt it will do anything for flukes so I would be reluctant to use it for that.
Sera Omnipur 
