I should mention that our HBG, LMB, YP, and HSB were all slow on the take with the Optimal. The BG fed aggressively after 4-5 days, the HBG after 9 days, the YP took almost two weeks, and the LMB and HSB never did show the enthusiasm they do with AQ.
Tony, I saw the same thing with the LMB in my pond. But, that was with the Optimal calibration food, which is a small size "worm" shape compared to the AM600 pellet. Now that I'm feeding the newer food which is a larger size, that feeding response has changed to the same response as with AM600 food.
