Some of my koi and goldfish have an increasing amount of white patches on their body, it is not in one particular place on each fish it is randomly spread, it is not on all the fish. I haven't removed any of the fish to have a closer look, it doesn't seem to bother the fish but i am a little worried that it may be the start of something serious, it started last year and is getting worse on some fish, any idea what this might be and how and if i can treat it?

Pond size is around 3000 gallons UK

Gravity fed filter to a five bay filter via a vortex, and UV filter, i top up with tap water have no heating in the pond, the bottom drain is flushed weekly

Thanks...copperfish

are the gold fish infected with this white stuff too ??
my first thoughts are carp pox thou it maybe something else if the gold fish have it too.
is there any chance you can catch one and take a pic and post on here.
i take it all your water parameters are ok ??

Hi copperfish welcome to the forum

Like koimaster said if you can get a pic we can have a look and help sort your problem

hi there

is this just on the fins or all over the koi ??

if you upload a pic or 2 we could help identify

we also have Sam Gibbs at hand our Koi Doc

its easy to upload pics ,, let me know if you need a hand

KR

Mr Miyagi