[Mark Cooper]

Hi Koifish girl. The advice that Dick gave is in my opinion is very good. Just to reiterate and add a little:

• Provide a facility with water quality at least as good as your koi pool; this is very important.
• Allow it to rest and you then can observe it and take mucus scrapes for parasites for microscopical analysis.
• Deal with any bacterial problems / wounds (salt and temps. around 70 degrees F will help healing)
• As a hobbyist, I would NOT prophylactically treat with antibiotics, because of the risk of bacteria developing antibiotic resistance.
• Only treat IF you have to, and only in response to a daignosed problem. If in doubt, get advice.

The question you pose is logical, but it assumes that your dealer has been able to effectively and efficiently QT a given koi, and that there or no remaining parasites or other bacteria that may take advantage of the koi being stressed (even slightly) following it's transportation to it's new home. Even healthy koi are rarely, if ever, parasite free.

I guess that we all have to make our own decisons about whether to QT or not. However, as I see it, the risk of introducing problems from even an apparently healthy "clean" koi from an excellent koi dealer is small, but the impact of any introduced disease/ parasite to your other koi could potentially be HUGE. Feeling lucky ?....
I hope that helps ?