Koi hobbyists are encouraged to promote the use of
English-style koi shows, which keep different sources
(owners) of koi separated during the show and judging.
Additionally, separate nets, siphon hoses, and other equipment
should be used by all show participants for their own
fish. The Japanese-style of show, in which koi from different
owners are placed together in the same tank, may result in
the spread of disease among susceptible fish. Regardless of
the show style, fish returning from shows should be quarantined
for a minimum of 30 days and held at 75°F prior to
being placed back into the general population. For added
security, blood sampling antibody testing may be helpful.
Survivors (fish that have previously been exposed to KHV
disease) should never be taken to a koi show.