GC Koi Farm | Koi Fish For Sale | Pond Supplies

2025 OCTOBER HARVEST

IZUMIYA YAMABUKI 14"-15" OMAKASE
From $195.00 $585.00

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OMOSAKO SHIRO UTSURI 17"-18" BOWL #1
$500.00

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YAGENJI 13"-14" BOWL 7
$195.00

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IZUMIYA YAMABUKI 17"-18"
$300.00

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YAGENJI 13"-14" BOWL 5
$195.00

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YAGENJI 13"-14" BOWL 4
$195.00

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YAGENJI 13"-14" BOWL 3
$195.00

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YAGENJI 13"-14" BOWL 6
$195.00

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OMOSAKO SHIRO UTSURI 16"-17" BOWL #2
$500.00

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OMOSAKO SHIRO UTSURI 15"-16" BOWL #3
$350.00

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YAGENJI 14"-15" BOWL 2
$195.00

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SAKAI BLOODLINE SANKE #4
$800.00

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SAKAI BLOODLINE TANCHO SANKE #4
$800.00

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SAKAI BLOODLINE TANCHO SANKE #3
$1,500.00

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SAKAI BLOODLINE TANCHO SANKE #1
$1,200.00

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SAKAI BLOODLINE SANKE #3
$800.00

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SAKAI BLOODLINE MARUTEN SANKE #2
$800.00

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SAKAI BLOODLINE MARUTEN SANKE #1
$1,500.00

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SAKAI BLOODLINE MARUTEN KOHAKU
$1,000.00

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VIEW ALL 2025 OCTOBER HARVEST KOI

ISA SHOWA JUMBO TOSAI FEMALE CERTIFICATE 13”-15” BOWL #2
$600.00

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ISA SHOWA JUMBO TOSAI FEMALE CERTIFICATE 13”-15” BOWL #9
$600.00

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ISA SHOWA JUMBO TOSAI FEMALE CERTIFICATE 13”-15” BOWL #5
$600.00

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SAKAI FF HIGH QUALITY JUMBO TOSAI 14"-16" CERTIFICATE BOWL #2
$1,200.00

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ISA SHOWA JUMBO TOSAI FEMALE CERTIFICATE 13”-15” BOWL #6
$600.00

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ISA SHOWA JUMBO TOSAI FEMALE CERTIFICATE 13”-15” BOWL #1
$600.00

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MOMOTARO KOHAKU HIGH QUALITY "NEW TYPE" JUMBO TOSAI 13"-15" BOWL #4
$995.00

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MOMOTARO KOHAKU HIGH QUALITY "NEW TYPE" JUMBO TOSAI 13"-15" BOWL #3
$995.00

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SAKAI FF HIGH QUALITY JUMBO TOSAI 14"-16" CERTIFICATE BOWL #1
$1,200.00

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TORAZO KOHAKU JUMBO TOSAI WITH CERTIFICATE

TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #38
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #36
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #34
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #27
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #26
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #24
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #20
$295.00 $400.00

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TORAZO KOHAKU JUMBO TOSAI 10”-12” WITH CERTIFICATE #19
$295.00 $400.00

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VIEW ALL TORAZO JUMBO TOSAI

MOMOTARO "NEW TYPE"

After nearly 10 years of crossbreeding Jumbo Karashi, Ochiba, and Muji, Momotaro successfully developed a groundbreaking Gosanke bloodline, known as the “New Type.” Some of these Nisai have already surpassed 26", with the largest exceeding 30". These koi are proven to grow large extremely fast. Select them now before they're gone

VIEW ALL MOMOTARO "NEW TYPE"

MOMOTARO "NEW TYPE" KOHAKU 10"-11" BOWL 32
From $240.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 10"-11" BOWL 34
From $320.00 $400.00

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MOMOTARO "NEW TYPE" KOHAKU 10"-11" BOWL 33
From $240.00 $300.00

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MOMOTARO "NEW TYPE" SANKE 10"-11" BOWL 35
From $240.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 6"-8" BOWL 21
From $150.00 $200.00

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MOMOTARO "NEW TYPE" GINRIN KOHAKU 10"-11" BOWL 30
From $240.00 $300.00

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MOMOTARO "NEW TYPE" GINRIN KOHAKU 10"-11" BOWL 31
From $240.00 $300.00

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MOMOTARO "NEW TYPE" SANKE 10"-11" BOWL 36
From $240.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 7"-9" BOWL 16
From $200.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 8"-10" BOWL 10
From $200.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 7"-9" BOWL 20
From $200.00 $300.00

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MOMOTARO "NEW TYPE" KOHAKU 7"-9" BOWL 18
From $200.00 $300.00

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Why Koi Lovers Choose Us

SHOP BY POPULAR VARIETIES

Kohaku

Sanke

SHOWA

Chagoi

Hi Utsuri

Karashigoi

BEST SELLING PRODUCTS

Nijikawa Growth Koi Food - Floating - GC KOI — Nijikawa Growth Koi Food - Floating
From $100.00

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Periha PB Submersible Water Pump with Variable Speed - GC KOI — Periha PB Submersible Water Pump with Variable Speed *FREE SHIPPING*
From $136.00 $170.00

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Elbagin (Yellow Powder Pafurazine F) 50g - GC KOI — Elbagin Antibiotics (Yellow Powder Pafurazine F) 50g
$34.95 $39.95

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Koi Sock Nets - GC KOI — Koi Sock Nets
$39.95 $49.95

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Nijikawa Professional Food - Sinking - GC KOI — Nijikawa Professional Food - Sinking
From $165.00

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Ceramic Bacteria House Round Filter Media 154pcs - GC KOI — Ceramic Bacteria House Round Filter Media 154pcs
$159.00 $199.00

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Koi Pond Foldable Quarantine Show Tank
From $299.00 $499.00

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Nijikawa Four Seasons for Cold Weather 15lbs - 5mm Floating - GC KOI — Nijikawa Four Seasons for Cold Weather 15lbs - 5mm Floating
$80.00

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AMAX Submersible Variable Flow AC Water Pump 7925 GPH - GC KOI — AMAX Submersible Variable Flow AC Water Pump 7925 GPH
$295.00 $379.00

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Grech Automatic Solar Pond Fish Feeder - GC KOI — Grech Automatic Solar Pond Fish Feeder
$189.00 $297.00

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Microbe-Lift Broad Spectrum Disease Treatment - GC KOI — Microbe-Lift Broad Spectrum Disease Treatment
From $24.95 $74.95

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AMAX BAKKI SHOWER 40 - FREE CERAMIC MEDIA
$1,620.00 $1,800.00

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Saki-Hikari Growth Diet 33 lbs Medium Pellet - GC KOI — Saki-Hikari Growth Diet 33 lbs Medium Pellet
$331.99 $399.00

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AMAX BAKKI SHOWER LARGE 60 - FREE CERAMIC MEDIA
$1,980.00 $2,200.00

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API Pond Ammonia Test Kit 130 Tests - GC KOI — API Pond Ammonia Test Kit 130 Tests
$19.95 $25.00

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Rhino Retro 2" and 3" Bottom Drains With Diffuser - GC KOI — Rhino Retro 2" and 3" Bottom Drains With Diffuser
From $311.00

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Aqua RDF 20 - GC KOI — Aqua RDF 20
$3,600.00

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Evolution Aqua Cetus Sieve - Pump or Gravity Fed - GC KOI — Evolution Aqua Cetus Sieve - Pump or Gravity Fed
$1,439.99

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Sequence 750 Series Pumps - GC KOI — Sequence 750 Series Pumps
$619.00

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EBD4A - EasyPro 4" Heavy Duty Bottom Drain with Air Diffuser - GC KOI — EBD4A - EasyPro 4" Heavy Duty Bottom Drain with Air Diffuser
$229.00 $249.00

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MORE BEST SELLING PRODUCTS

POND FILTRATION

Evolution Aqua Nexus 220 (4,800 Gal) Filtration Systems - GC KOI — Evolution Aqua Nexus 220 (4,800 Gal) Filtration Systems
$2,339.99 $2,879.00

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FREE DRUM FILTER 20 - 5000 GPH
$3,450.00

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Aqua Shower Eco - GC KOI — Aqua Shower Eco
$3,600.00

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Aqua Bio - GC KOI — Aqua Bio
$3,400.00

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Aqua RDF 50 - GC KOI — Aqua RDF 50
$4,700.00

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Aqua RDF 35 - GC KOI — Aqua RDF 35
$4,200.00

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Aqua Ultraviolet Ultima II 20000, 2" Ports - GC KOI — Aqua Ultraviolet Ultima II 20000, 2" Ports
$3,353.00 $4,790.00

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Aquadyne 1000 Bead Filter - GC KOI — Aquadyne 1000 Bead Filter
$1,599.00 $1,995.00

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Evolution Aqua K+ Advanced Pressure Filter 24000 - GC KOI — Evolution Aqua K+ Advanced Pressure Filter 24000
$3,959.00

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Evolution Aqua K+ Advanced Pressure Filter 14500 - GC KOI — Evolution Aqua K+ Advanced Pressure Filter 14500
$3,239.00 $3,499.00

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Evolution Aqua K+ Advanced Pressure Filter 9600 - GC KOI — Evolution Aqua K+ Advanced Pressure Filter 9600
$2,519.00 $2,799.00

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Evolution Aqua K+ Advanced Pressure Filter 4800 - GC KOI — Evolution Aqua K+ Advanced Pressure Filter 4800
$2,259.00 $2,599.00

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MORE POND FILTRATION

KOI BLOGS

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HOW TO WINTERIZE A POND: FALL POND CARE

When fall arrived and winter is around the corner, there's more than just your home and garden that needs preparing. Your koi pond also beckons for some attention. Just as you would winterize your home's plumbing, a koi pond too needs winter care.

A COMPREHENSIVE GUIDE ON HOW TO QUARANTINE NEW KOI

Are you planning to introduce new koi to your pond? Quarantining your new koi is crucial to ensure the health and safety of your existing koi population. In this blog, we will discuss the importance of quarantine and provide you with a step-by-step guide on how to properly quarantine new koi.

koi fish pond with plants in the background

SPRING PREPARATION FOR KOI POND

After a cold winter, preparing your koi pond for spring is an important step to ensure the health and well-being of your koi fish. Here are some tips to help you get started:

HOW TO TELL IF YOUR KOI ARE MALE OR FEMALE?

Determining the gender of koi can be difficult, especially in younger fish. However, there are a few physical characteristics you can look for to help identify male and female koi:

HOW TO TREAT KOI ULCERS

Koi ulcers can be caused by a variety of factors, including bacterial infections, parasites, or physical injury. If you notice an ulcer on your koi, it's important to treat it promptly to prevent the infection from spreading and causing further damage. Here are the steps to treat koi ulcers:

SHOULD YOU FEED KOI DURING WINTER

Winter can be a challenging time for koi keepers, as the colder water temperatures can slow down the metabolism of the fish, making it more difficult for them to digest their food. To ensure that your koi remain healthy and active during the winter months, it is important to follow a few key guidelines when it comes to feeding.

HIGH QUALITY JUMBO TOSAI

MOMOTARO "NEW TYPE"

Why Koi Lovers Choose Us