Anecdotal evidence at my place suggests that there is less waste when using a larger pellet for fish that size. It seems that the littler pellets are more likely to end up drifting to shore and getting caught within shoreline vegetation. Just a thought.
Remember that if you set your benchline "trouble" temp at 70 degrees, then theoretically you should be aerating all of the time at air temps below this to take advantage of the cooling effect.
I'm no salmonid expert, but it seems like you've taken a fairly conservative stance on feeding schedules. Quite a few people out there are feeding more than you--and probably taking a pretty good risk in doing so.
