My maroon female and male feed mine their PE mysis lol. It gets a couple of those a week and sometimes on a rare occasion I cut a silverside in half and give it to it. I wouldnt recommend spot feeding anything more than one every two weeks.
Edit: Just remember the more offen you feed them the more energy they must consume to digest the food; energy that would otherwise be used to absorb the sun; I believe BTA's are vulnerable to over-feeding so just be careful.