For a long time I fed the 32% protein feed to my fish. I then last year changed to 36% and I thought I had really stepped up in my knowledge. As I read more about the feed I realized I had probably made only a baby step of improvement. I now hope to make another step this year by ordering the aquamax 400. It is 3/32 compared with the 3/16 size of the 36% food. I hope to make a smooth change in the food with no feeder problems. I have the ADF 75. I must be very slow upstairs to of fed that many feathers so maybe my learning curve is improving. The way I see this change is I can feed a lot less food with the higher protein. It should be easier on my back also. Do you see any problems that I have missed?