One of the spare options for feeding fry cockerel in the early days is feeding fry egg yolk. The main advantage of this option of feeding is its simplicity and readiness in a short time. Unlike yolk, obtaining infusory culture requires at least 3-4 days of time to obtain a decent density of infusory culture.
Cook the chicken egg for 10 minutes, cool in cold water, clean, extract yolks.
Pluck a small piece of yolk and put it in a glass. Add some water and rinse (dissolve) the yolk to the smallest dust.
Let the water settle a little, settle the yolk on the bottom, drain the water and collect again. It is desirable to repeat this procedure 3-4 times. Then we collect yolk mass in a syringe and add it to an aquarium with fry.
It is necessary to feed in very small portions and at least 6 times a day. Yolks are fed to the fry up to the age of 5-7 days, after which the fry are transferred to larger feed, for example, naplia artemia.
When feeding fry cockerel with yolk, it is necessary to observe some rules.
1) Do not add too much yolk mass to the aquarium, it spoils and spoils water very quickly.
2) When feeding yolk, the aquarium must be equipped with an aerlift filter or a simple sprayer, this will allow you to prevent the yolk from settling to the bottom for a long time. In the water column, fry are more willing to eat it than from the bottom of the aquarium.
3) You need to let 5-10 snails into the aquarium - melanias, at least they will somehow fight with the yolk settled on the bottom, not letting it spoil. Melania is left in the aquarium and when fed with artemia nauplia or other rapidly spoiling feed.
The yolk is stored in a refrigerator, wrapping it with foil or food film. A new solution of yolk is prepared every day. In the refrigerator, the yolk can be stored for up to 7 days, and this is quite enough just before the fry is transferred to larger feed.