I had my little potters for over two and half years before losing him to a faulty heater. During the time I had him, he ate the following foods with gusto:
Frozen:
mysis
brine
rods food
Fresh:
scallop
clam
prawn
squid
salmon
Dry:
NLS pellet
Spirulina Flake
Elos Spirulina Pellet
This fish literally ate everything from the beginning. I feel as though you are able to obtain a healthy specimen, potters angels can do very well and are relatively hardy.
~Michael