I feed my community fish with cocktails of froozen bloodworm, froozen brine shrimp, freeze dry dalphian and std fish pellet.
I have done some research on live food as innitially i though they provide better nutrian for the fish but latter i found out live food are actually more dangerous for fish as they might introduce diseases to your tank as normally blood worm, tubifex worm etc live in dirty water.
Froozen is the best as during the froozening and radiation most of the germ and bacteria are kill.
If you brought fresh shrimp from market it might works but you can just buy froozen one from your
lfs.