Koi fish are one of the world’s largest species that are often kept in ponds. The average size for koi is nearly 2.5 inches in length and a weight of 1.5 ounces. Let’s take a look at how big these fish can get depending on size and overall conditions.
Standard Koi Fish Sizes
Koi fish are typically categorized by their size. Domesticated fish do tend to be smaller, but some homeowners choose to keep larger fish.
The majority of these fish will grow to around 12-15 inches long. Due to their relatively small size, they are best suited for indoor aquariums. They often look beautiful when complimented nicely in a home aquarium. They also do not feed a lot so they are very easy to maintain.
Japanese koi are larger than most other types. Japanese koi can grow up to 26 inches in length, meaning they will not fit in an averaged size home aquarium. This type of fish is usually found in outdoor ponds where they can swim freely.
Jumbo koi are the largest type, growing up to 36 inches long. They need to swim in sizable outdoor ponds for survival. The largest Jumbo koi ever recorded weighed in at a whopping 91 pounds.
Koi Fish Growth Rates
Generally, a koi fish will take nearly 3 years to reach its maximum length. However, there are some smaller koi types that can reach full size in 2 years or less.
Most koi fish will reach about 8 inches in length after their first year, and the rest of their growth will depend on the type of koi, as well as a few other factors outlined below.
Factors That Impact How Big Koi Fish Will Be
The likelihood that your koi fish reach their maximum size is quite unlikely. Here are a few factors below that will impact their overall size.
Nutrition And Genetics
Fish food that is full of vitamins and proteins will help maximize growth. Some food brands are also designed to enhance the color of the fish. Genetics will determine how large they grow.
When good genes are combined with high-quality water and food, the fish will have the best chance to grow to their maximum size.
Water Quality And Temperature
75 degrees Fahrenheit is the best temperature to promote koi fish growth. Lower temperatures often result in slower rates of metabolism and growth.
Water that is cleaned regularly will promote healthier koi. Meanwhile, water that is cloudy or dirty can ultimately stunt their growth.
Phoenix Area Pond Supply
If you are looking for live fish, live plants, pond filtration, pumps, or anything else you need to start or care for your water garden or garden pond The Backyard Pond has everything you need. We serve residents of the greater Phoenix area with the best selection of Koi, plants, and all the supplies you need. Stop by or give us a call at 623-878-6695 with your questions.