At three days, all of the fry should be swimming around in the tank or pond. australian email database Feeding Koi Fry Any fry that have developed this far should be ready to eat. Remember that at this point, their taste buds are not mature, and the only way they will know that food is available is to see it floating around them. Most Koi hobbyists use hardboiled egg yolk as the fry’s first food. Brine shrimp are also a fine choice of food for baby koi once they have reached about seven days old.
the fry is a messy chore that can really make the water dirty. Keep it as clean as possible using a siphon, then add fresh water as needed. This will help to take out both the nitrates and the ammonia from the water. Make sure you have let any tap water sit for at least twenty-four hours so that the chlorine can evaporate from it. After around four days or so, you will want to take out the material that was placed into the tank or pond for the eggs to stick on.