Breeding koi is a process that involves many different actions. When you know what you are doing, you greatly increase the chance of good quality and quantity of young koi carp.
If you already own koi carps, you will have noticed that the koi carps start spawning at the beginning of the summer; the males encourage the females to spawn. The men then fertilize the calf. With a little luck, new koi carps are born. In this case you can let nature take its course and wait to see if the eggs are indeed fertilized and whether it goes well after the birth of the young koi carps.
However, there are also ways to exert more influence on this, with which you can increase the chance of a successful mating and growth process. For example, you can encourage spawning and allow the fertilized koi eggs to hatch in ideal conditions. We are happy to explain how you approach this and we also list the most important do’s and don’ts below.
How do you start breeding koi?
Naturally, Koi breeding starts with the placement of a male with a female. If it is successful with spawning, the female will spawn. After the male has fertilized these eggs, it is advisable to remove the eggs and place them in a separate container. If you do not do this, it can happen that the calf is eaten by the Koi! It is very wise to choose to place spawning brushes.
When the calf gets stuck in these spawning brushes, the koi can no longer reach it and the eggs are therefore not eaten. After spawning, it is waiting for the eggs to hatch. It is also best to keep small Koi apart from adult Koi for a few weeks, because even the little ones still run the risk of being eaten. In addition, there is a difference between the size of the fish food for adults and for young carp. Young carp cannot eat the large food yet.
Do’s and don’t when breeding koi
To be successful in breeding koi carp there are a number of do’s and don’s that you can take into account. The most important do’s:
- Are males too aggressive towards females during spawning? Set the female aside for safety!
- Do you put the eggs separately in a container? Make sure there is always enough fresh water in the container. A bucket of fresh water a few times a day is normally sufficient.
- Aerate the water well.
- Newborn koi carp do not need any food in the first few days, because they are not yet fully developed. Only when their mouth and swim bladder are developed will they really start swimming. From that moment first feed them small amounts to prevent them from eating themselves to death.
- Do you want to put the grown young carp in the pond? Make sure that the temperature and water values in the tank are similar to those of the pond, so that the transition is as small as possible.
If you follow the do’s, chances are that you will be able to successfully breed koi parkers.
10 tips for koi breeding
- Keep your breeding koi well-fed during the month before you start breeding them.
- Koi breeding is usually the most successful in late spring and early summer.
- The quality of the baby koi fish strongly depends on the quality of the parents. Start with strong, healthy parents and you will end up with more koi carps that survive until adulthood.
- The best age of a koi to breed with is between 3-6 years old, but koi were also able to produce baby koi fish when they were 15 years old.
- Make sure you give your breeding Koi couple some privacy when it’s time to mate.
- Koi need a place to lay their eggs. With a spawning brush or similar facility, they can lay their eggs with confidence.
- The temperature of the fish pond water must be between 15.5 and 21 degrees during incubation. Do not disturb the eggs at this time.
- Keep an eye on your male Koi fish so that they don’t put too much pressure on the female koi. This is noticeable when the male continues to press against the female.
- Make sure you have a “protected area” for your baby koi fish when they first hatch. They cannot swim well and are vulnerable to predators. Use a fine mesh to protect them and prevent them from being sucked into the fish pond filter.
- Breeding Koi can be a nice extra income. Koi can grow up to 30 cm in about two years, after which they can each yield quite a bit, provided they are healthy.