How can I get my baby guppies to grow quickly?

Feed them on a steady diet of brine shrimp, daphnia and crush or even pulverized flake food or dried food. The food can be ground down to a powder for their first 2-3 months. You can feed these babies several (2-4) times a day, making sure they eat everything you offer them. Any wasted food should be collected 1-2 times per week. If the babies are large enough you could introduce a few white cloud minnows and bottom dwellers such as shrimp and snails in with them to help eat any excess food. This will promote the best water conditions possible. Poor water conditions can lead to disease which can prove very difficult to cure, especially in young fish.