Sorry for the delay in response! I worked last night and didn't get a chance to get on the computer.

Babies don't necessarily need a particular water temperature. They do prefer it colder. If you're hatching out eggs then the colder you keep them the longer it will take them to develop and the warmer you keep them the faster they develop. I think 65*F was what I was told as a good temperature to make sure they develop fully. And as mentioned adult brine shrimp are way too large for a baby to ingest. You have to set up a brine shrimp hatchery and make sure you have baby brine shrimp for a few weeks until they get their front limbs and then you can switch to frozen blood worms or frozen brine shrimp (adults).