i stopped feeding flakes and make my own food now.
i use various veggies, some shrimp, and steam them on the stove, then put it all in the blender and blend it to smoothie consistancy, then mix a couple packets of knotts unflavored gelatine with about 1/2c. of hot water and mix it all together. let it cool in a 13x9" pan lined with plastic wrap and cut it into little squares.
this way i can control what my fish eat, and make sure they're not getting preservatives and nasty stuff, plus the gelatine texture is better for their digestion.