Basically rotifers and microalgae... You will need to start a culture yourself but getting culture from other breeders or LFS that sells those live zooplankton in a bottle...
You will have lotsa chances in the future, they will keep spawning regularly...
As for the special tank, it is a kreisel tank concept... Meaning the larvae will be in constant suspension..
For the DIYing , I think you will need a special micron sheet that allows water to flow thru but not the larvae and food...
Not a expert in this but try searching ard for more info, try the below forum too... Might be of some help...
But seriously, it is more work than it seems..
MOFIB