Category Archives: Koi Fish Facts

Koi Fish Facts, including everything you’d want to know about keeping koi fish. How to care for your koi fish, and how to maintain a happy, healthy koi pond (or tank).

9.5” Beni Kumonryu Doitsu Koi Fish|10.5in Beni Kumonryu Kawa goi scales|7” Armor Scaled Kujaku|6” Kikokuryu Butterfly koi|Mirror scaled Doitsu Koi|Armor scaled Doitsu koi|Leather Doitsu Koi without scales|Armor scaled doitsu koi|Mirror scaled Doitsu koi|Leather Doitsu koi
Doitsu Koi: Tipping the German Scales

Doitsu Koi are a fairly recent addition to the Nishikigoi universe. The word “doitsu” is[read more...]

12
Oct
Carp Pox on a koi fish
Carp Pox and Your Koi

Cyprinid Herpesvirus 1, more commonly known as Carp Pox, is one of the oldest recognized[read more...]

25
Sep
Two koi fish swimming under algae|String Algae on a pond surface||
Algae and Your Koi Fish Pond  

Got Algae? Here’s what you need to know about algae in your koi pond, how[read more...]

10
Sep
Koi swimming in a pond|Lesion caused by Aeromonas|anchorworm in a koi|Chilodonella under a microscope|costia under a micrscope|Dropsy with pine coning of the scales|Fish lice under low magnfication|Ich under a microscope|Columnaris under a microscope
How to Recognize and Treat Common Koi Fish Illnesses

We have recently been posting about the different types of bacteria and parasites that are[read more...]

03
Sep
Dropsy and Your Koi Fish
August 25, 2015

Dropsy (which is an old-fashioned term for edema) is also known as Pinecone, Bloater or[read more...]

Asagi and Shusui koi swimming|Chinese Hi Fin Banded Shark|Golden Orfe|Trapdoor Snail
Pond Mates for Your Koi

With the varieties of koi that are available, it is conceivable that you will never[read more...]

30
Jul
Fish Lice (Argulus foliaceus)|Fish lice under a microscope|Fish lice attached to a fish
Fish Lice and Your Koi

In the truest sense of the word, fish lice (or Argulus foliaceus) is not a[read more...]

22
Jul
Chilodonella viewed at 400x under a miscrope||Single chilodonella in a microscope|Chilodonella in a microscope
Chilodonella and Your Koi Fish

Chilodonella cyrini is another microscopic protozoan that can be deadly to freshwater fish. The protozoan[read more...]

16
Jul
koi fish swimming under pond plants
9 Ways to Keep Your Pond Plants Safe From Your Koi

Pond plants in and around your pond offer a pleasant viewing experience, but there is[read more...]

08
Jul
Ichthyophthirius multifilis under a microscope
Ich and Your Koi Fish

Short for Ichthyophthirius multifilis, Ich is another freshwater parasite that loves to hide in the[read more...]

01
Jul