K.O.I. is an international group of expert hobbyist-volunteers who want to promote FUN in the Koi hobby by teaching all aspects of Koi and pond keeping, with a focus on Science. 

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Membership Renewals Were Due March 1!  Supplement #9 Shipping NOW!

CKK Scholarships always available to all Member Clubs!

NEW! Angled Net Fitting - For Sale NOW!

Sad news: Our founder and mentor, Spike Cover, passed on April 4, 2023.


Welcome To Everything KOI

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Join as a NEW Member

NEW PLUS Membership $120

Renew an Existing Membership $15

SPECIAL! Renewal & BIG Book Binder - ONLY $20

Registration with the K.O.I. website is NOT Membership!  CLICK HERE to learn more...

!If you're not havin' FUN, you're not doin' it right