How to feed baby-fish whitebait.

Tank set-up


Thank the God.
The tank needs a small pump inside to create a water-current. The gills of fish use moving-water to breathe, so the water needs to be moving.
It's not the same as having water rain upon the tank's surface.
The tank needs an air-pump to provide oxygen in the water.

Types of baby-fish


There are two types of baby-fish, based on the salt.
1) sea-water baby-fish [note 1]
and
2) fresh-water baby-fish [note 2]

Transporting baby fish


If you have caught some baby-fish, you will need to transport them (from the net to the fish-tank) in sea-water.
Preferably sea water that has previously been in a clear tank with sunlight to bloom the phytoplankton (green vegetation single-celled algae).

Sorting baby-fish from fresh water and sea water


0) keep your fish in sea-water
1) watch your fish every 10 minutes
2) if a fish is lying still at the bottom of the tank, move it to a river/rain water tank.

Feeding sea-water baby-fish


You feed sea-water baby-fish with "brine shrimp" (also known as "sea-monkeys") and "sea plankton" (the algae that grows on seawater.
How to build a brine-shrimp hatchery Try hatch a couple teaspoons of brine-shrimp eggs in 1.5 litres of salt-water and add that every third day (and miss 7th day as day of resting from work)
.

Feeding fresh-water baby-fish


You raise "water-fleas" and add water-fleas (called Daphnia) to the water-tank.
I suggest raising water-fleas to a tank dedicated to raising water-fleas, and make sure the water-tank has green-algae added to keep the water greenish.
How to raise water-fleas

final tips

always love God to thank God for every little creature you can see, which God made and saves now.

Notes


In different countries, baby-fish are called "white-bait", or in america called "fish fries".
Here's a comprehensive beginners guide to salt-water aquaculture. https://www.earthsfriends.com/saltwater-aquarium-for-beginners/ From google's search.


[note 1]

Salt-water fish have the same ratio of salt in their flesh as the ratio in salt-water.
and salt acts to 'draw' out water.
so a salt-water fish will draw in water from the outside and not be able to excrete the water as normal
so the marine fish turns hypotonic and 'drowns' in freshwater. https://www.livescience.com/32167-can-saltwater-fish-live-in-fresh-water.html


[note 2]

Fresh water fish have less salt in their body than the surrounding sea-water
so because water moves from less-salty area to more-salty area (to eventually even out the water-salt concentration)
the fresh-water looses water to the outside, dehydrates and dies.
https://www.cuteness.com/article/how-happens-freshwater-fish-saltwater-tank

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