two of your Koi ????? like this http://a.1asphost.com/fredfrog/orfe%20small.jpg
is columnaris or aeromonas with a fungal overgrowth.
treat with PP every other day 3 times, add peroxide on last day.
now...... if your pond is loaded with leaves this isnt going to work.
fill 100 gallon holding tank or kiddie pool with pond water, drain rest of pond and
when the fish are nearly flopping on their side net and move into the holding tank..
be sure to cover with bird netting to keep em from jumping.
use a plastic shovel to get rid of the muck in the bottom ... shovel into buckets and
sucker somebody into moving buckets to compost heap.
DONT scrub sides of pond, refill and when there is enough water to cover the fish
salt dip the fish before putting them back in the pond.
put the water on spray and let it slowly refill over night or a couple days. DO NOT
use water colder than the pond water. it can be up to 10o warmer.
http://puregold.aquaria.net/pg/disease/disease.htm
PP treatment and salt dips in treatment section.
Ingrid

(Ms C. Peach) wrote:
Two of my Koya (at least 8" long) have recently developed a grey mould
about 1" round on their backs.

Can anyone advise me on what to do? I have around 12 fish in total of
different ages and size. They have all been together for around two
years.

Chris.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
List Manager: Puregold Goldfish List
http://puregold.aquaria.net/
www.drsolo.com
Solve the problem, dont waste energy finding who's to blame
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unfortunately, I receive no money, gifts, discounts or other
compensation for all the damn work I do, nor for any of the
endorsements or recommendations I make.