for the 1st 3 days after hatching, nothing. when they started to move around relatively freely i used the liquifry no1 for egglayers, 3 times a day (before i went to work 6am, home from work 4.30pm, and before bed). I kept this up for about a week, then they start looking a lot healthier, and you can see the stomach with food in.
At this point i started introducing interpet's "freeze dried brine shrimp" in small doses,i.e alongside 1 out of 3 feeds for a day, then 2, then all 3 feeds, then start to increase the shrimp, and decrease liquifry. Probably better to feed them live, freshly hatched brine shrimp, but with work commitments, and 2 kids, haven't got time or space for the cultures, so i chose the easy option. After 2 weeks afrom hatching they should be more or less only onto brineshrimp. This has the commical side effect of making their bellies orange
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I kept them on that until they started showing the vertical black stripes, and took on the familiar barb shape, then i simply used finely crushed (with fingers)"aquarian" purple tropical food, made by "Waltham". Again, slowly reducing one, whilst introducing the other. Im getting close to the point to stop with brine shrimp with these now, which has been about 6 week from hatching (wish i took more notice of dates).
Just a matter of keeping the flake crushings in proportion to the mouth size after that really.. but always look out for the smaller ones! they're a better indicator of how they are doing as a whole, the ones you see out and about are the biggest and boldest.