Actually, my bluegill's favorite is the Aquamax Grower 500. They like the 400, but they spend a lot of time for the nutrition that they're getting. They love the 600 too, but any bluegill under 7.5 inches seem to be left out. I think the ideal may be a mixture of 500 and 600, with some hand feeding of 400 in the areas where the little guys hang out.
