It has been 25+ years since Hi Silk 21 Koi food was developed in Japan.
Ever since, people across the world are going crazy over this food because no other food can make their Koi grow as big and fast. Learn more how this food enhances koi skin, make them faster, and overall improve their health.
Read our full Koi food guide for ultimate color and growth to learn about all koi foods we recommend. This article is specific to the Hi Silk Koi food products, which we think is incredible!
Video About Hi Silk Koi Food
Hi Silk 21
Why do we love Hi Silk 21? It’s because this food will make Koi grow fast, big and healthy. In addition, silk powder in the food will enhance the Koi’s skin’s white ground to become whiter.
Did you know Koi breeders in Japan used to feed silk worm pupae before these pellet foods were invented? They are natural food and also readily available because at the time, silk industry was big in Japan. The silk worm pupae were by-products of silk manufacturing. Also, from the breeder’s experience, they knew silkworm pupae makes Koi faster, bigger and fatter than anything else.
Why are silkworms so good for growth?
The secret lies in the protein. Protein, once ingested, dissolves into amino acid. Then, the absorbed amino acid will be constructed back to the protein and flesh of the body. The amino acid structure of silkworm pupae is very close to that of Koi. So the conversion rate of the food into nutrients is very high. This is why silkworm pupae are known as the best growth food for Koi.
Disadvantage of silkworm pupae
The biggest concern is the silkworm pupae’s freshness.
Technically, it is a dead caterpillar; so it sounds funny to talk about the freshness. Due to a unique technique, a silkworm pupae can maintain its original form even after 10 years. So amateurs like us cannot tell if the silkworm is 1 day old or 10 years old. Obviously, if we feed Koi 10-year old silkworms, that will cause some internal problems and make Koi sick. I know there are other silkworm products on the market, but I suggest you be careful and not use them unless you know for sure how fresh they are for the sake of your Koi’s health.
Benefits of Hi Silk Food
Before Hi Silk was created, everybody in Japan wanted to feed their Koi with silkworm pupae products; but at the same time, they were scared to because they did not want to sicken their Koi.
Then about 25 years ago—Mr. Kawaguchi of Kawaguchi Shoten Co., Ltd (pictured above far left) and Mr. Mamoru Kodama, author of Kokugyo books and founder of Kodama Koi Farm (pictured above second to the left)—developed Hi Silk 21.
Mr. Kawaguchi, a leading supplier of silk and silkworm, provided quality fresh silkworm pupae. Mr. Kodama, a koi expert, designed the food with the silkworm pupae creating amazing Koi growth results.
The Hi Silk Food they developed has the same features as silkworm pupae—making your Koi grow fast, big and healthy. We do not have to worry about feeding OLD silkworm any longer. Plus in pellet forms, the quality became much more stable.
Another surprising ingredient they added was silk powder (powdered silkworm cocoons). Silk powder helps your Koi get snow white skin. Fibroin, an amino acid in silk, is very good for the health of liver. Improving and maintaining the health of liver means snow white Koi skin.
I also personally like the smell. When you open the bag, you can smell the silkworm. The smell also attracts Koi and stimulates their appetites.
Can I combine Hi Silk with other food?
If you are looking for food to make your Koi grow fast, big, and white, this is definitely the one to consider. There are a few suggestions about feeding with this food. Due to high protein, please feed this food only when the water temperature is above 68 °F.
Also, please feed alongside color-enhancing food like Kodama Koi Food Color-Up. Because Koi will grow fast, it is important to combine it with color-enhancing ingredients to maintain or even improve the coloration.
Hi Silk Sweet Potato
Hi Silk Sweet Potato is another product line of Hi Silk series. Just like silkworm pupae, sweet potato is known as a favorite food for Koi and is very sweet. Basically, I think Koi loves the sweet food like we do. Hi Silk Sweet Potato is designed for all seasons, especially low water temperature.
You can feed your Koi this food all year around. Or if they do not seem to be eating much, feed them this to boost their appetites.
Hi Silk 21 Color
Buy this feed for Hi Silk Growth + Color Enhancement
Hi Silk 21 Color now comes with color enhancement. A combination of astaxanthin, spirulina, and krill enhances koi’s skin color beautifully.
Great for warm weather to grow koi big and enhance their colors. Your Koi are going to enjoy this yummy food
Order Hi Silk Koi food from Japan
We are not kidding when we say that Hi Silk Koi Food will make your Koi beautiful. After years of testing out different products at our koi farm, we are very confident that this is one of your best options. When combined with our color enhancing koi food you achieve maximum benefit.
See all our recommended koi food for your pond.
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When will it be shipped? I’m almost out of last year’s food. Koi are really active now. Let me know please
Is it necessary to soak hi silk 21 sinking food for 1-2 hours before feeding to koi to soften the pallets for koi easy digestion ? Thank you
Hello, No you do not have to do that. Please feed the pellets as is
What is the different between feeding hisilk & hisilk potato ?
When to feed potato & when to feed hisilk ?
What is the main result between both ?
Hi Silk Sweet Potato is all season type. So if water temperature is over 50F or 10C, you can feed Hi Silk Sweet Potato. Hi Silk is the growth food. So please feed them at 68F or above
Hi Kodama Koi Gardern… What is the recommended ratio to mix HiSilk 21 and HiSilk Color? Is it 1:1 or 2:1?
Thank you for your question. During the summer season, 1:1 will do. but if you would like to push more growth, you can do 2:1. And if you can push color enhancement more, you can do 1:2. It all depends on your goal.