Koi stringy white poop

[PorshaF]

?

 

[Colin_T]

what sort of fish are they in the pictures?

 

[PorshaF]

Sold as soragoi doitsu but I think it was a blue ridge doitsu with poor pattern. Koi

 

[PorshaF]

Could it be KHV? I've bought other fish from there recently, a clown pleco and Amano shrimp, who seem healthy in their own quarantine, so maybe it's a species virus?