I keep feeder tanks, It is really more of a pain than anything. They don't grow fast enough and most of the smaller fish, guppies etc. barely make a snack. my 2 cents.
What do you breed for feeders?
Really the maintenance i dont mind so much as i have a pretty solid routine that works well so far..is that the painful part? or the fact that your fish dont seem satisfied?
My main goal is to stay away from going to the LFS to get feeders and having to QT them for a couple of weeks all the time.
If i can get some QT"d that will survive and reproduce, then i can better monitor their health and notice any issues with the tank. Rather than covering up the mistake before the doors open and customers come in to buy sick fish to feed to your healthy fish..