AKCA
Associated Koi Clubs of America
Koi USA Magazine
Koi USA Magazine is a great resource for koi keepers and koi enthusiasts.
Koiphen Koi Forum
Great Koi forum and resource for Koi Keepers
Fin & Feather Tropical Pets
Fin & Feather is your source for Whisper® filter parts and supplies, in Oneonta, New York 13820. They carry Magnetic Impellers, Motors, Extension Tubes, Cartridges and more.