My perch attack the Optimal brand fish food like it is their last meal before meeting their demise. They are not fussy on pellet size, just love the taste. I think optimal fish food has mastered the art of finding the right ingredients and the correct way the oil and smell dissipates from the pellet after it starts getting wet in the water. The nice thing is that they have lots of choices and ship rapidly to your door for no extra cost. Go to their webpage and give them a try.