Best way to fed these is to establish some pond life in your tank. Scuds, specifically.
^ that'd make for an interesting aquarium. I'm thinking if setting one up now, got 3 spare tanks ready to go and access to tons of native plants to scape, including algae as disgusting as it sounds would probably look really good in a dimly lit tank full of these guys:
Looks like an exciting little venture, new tanks and learning about new fish is so much fun, especially a little odd ball like that, hopefully you will get a little breeding group:thumbup:
They also may breed for you.