Yes, I do feed them tidbits almost every day.
I had the same BTA under the same light (before he split into 2) over a year ago & he was getting smaller, even with feeding. So I added 65w PC light, then upgraded to 250w MH when I went reef.
Now he (they) is basically under the same exact light & bulbs & doing fine. Actually seems to be doing better then when they were in the 55g w/dual 175w MH & 80w NO actinic