Bruce,

My experience absolutely agrees with your statements...small grass carp are far superior vegetarian consumers than large grass carp.....further, in my ponds, only the large grass carp come to the feeders regularly. My experience says that the useful life of a grass carp in my ponds (useful life defined in terms of weed control) is limited to three years.

Because of that, I "replace" grass carp as they get to a size where their main interest appears to be pellet food.

Regarding turtles, DD may be right about them not consuming large amounts of pellets, but at $22 per bag for high performance Rangen feed that I transport many miles to the ranch, I don't have any feelings of friendliness toward pellet eating turtles.