If your goal is to end up with Koi that reach their full size and have their true vibrant colors, you will need to consider many things before you just throw in the food.
To coax your Koi to reach there full and maximum size you should feed them more often daily.
This does not mean you overfeed them, just that you parse out the recommended amount of daily food into 4 to 5 feedings.
When doing this you can expect your Koi to create more waste so be sure to have this cleanup covered by installing a good filter and large enough biological filter media.
Make sure the ammonia levels, usually created by excess excreted waste floating around, does not rise as that can harm the Koi.
You may have already been told that if planning to keep Koi, specially several of them, you should think of getting everything big.
A big pond, a big filter, a big water pump, and lots of time to take care of them and enjoy looking at them.
You need to buy food that is specifically for Koi fish.
Giving them generic fish food will inhibit their growth.
You might see them get fat but they will not reach their potential length.
In addition, regular fish food does not have all the special proteins that Koi need.
Koi can also be give special treats like fruits and vegetables.
The ones they love best are grapefruits, oranges, lemons and watermelons.
Be sure to cut them into small pieces.
These are just meant to be treats to give them sparingly.
Koi do not eat in the winter.
You should start preparing for this in the fall.
As the pond water temperature start dropping and up to about 50 degrees Fahrenheit your Koi will still eat.
As this time you need to feed them special food that has high levels of wheat germ to help there digestive system.
This food actually cleans them out so there body can better handle the winter months.
Once the pond water gets colder than 50 degrees you need to stop feeding the fish.
The Koi will now almost hibernate.
They float around slowly and live off there own body fat.
As spring approaches there body goes into reverse.
Once the temperature goes above 60 degrees you will need to start feeding them again.
Here you need ramp up slowly.
Start with one feeding a day and move up as you see your Koi react positively.
Once you see them moving around a lot more go back to all your regular care schedules.
Koi fish are exotic and colorful fish that can grow up to couple of feet long.
There are some species that are actually 3 feet in length when fully grown.
These are beautiful fish that are very calming to look at and not that difficult to care for if you take the time and effort.