What they said! I can definitely attest to a bigger tank helping too. I had to hold one batch of fry in a breeder net while waiting for my dividers to come and the difference at 3 weeks between them and the ones that had the whole tank is significant. And since I moved them to the grow out tank they are just growing like crazy! Comparing albino socolofi & red zebra OBs so very similar fish.
I fed brine shrimp, algae wafer bits & finely crushed veggie flake for the 1st 2 weeks. Then I started giving them fresh veggies, NLS growth & Kens veggie sticks w/ Calcium. At 5 weeks my bigger albinos are just under 1". I did not raise the temp though because I hear that shortens their life expectancy. Good luck!