Every Koi keeper hates seeing ill fish, and if they dont recognise it correctly and fast enough, more than likley the fish will die.
I scrape my fish often, for several reasons and here is a couple..
PRACTISE – Makes perfect, remembering how to recognise the parasites and use the scop
HEALTH – Its good koi keeping practise to check any and all fish if you notice some odd behaviour !
The fish this scrape was taken off had been treated with several medicen’s however still not dead !!