Quarantine and treatment protocol for new fish?

[Abby]

Rescued 2 18 inch koi today that seem healthy overall… planning on quarantining them in our small pond away from the other fish. Any recommendations on length of quarantine and proactive treatment products and regiments to be safe? Thanks in advance!

 

[GBBUDD]

I'll do a proform c for the recommended stay , 1/3 water change between dosage, once that's done ill let the fish sit a week with 1/3 water changes each day .
end of second week i'll dose prazi for a week . then water changes again and introduce to the pond the third week if everyone looks good

but i have seen others take it way past this

 

[Abby]

I'll do a proform c for the recommended stay , 1/3 water change between dosage, once that's done ill let the fish sit a week with 1/3 water changes each day .
end of second week i'll dose prazi for a week . then water changes again and introduce to the pond the third week if everyone looks good

but i have seen others take it way past this

Thank you so much!