MJ, the "book" is a very broad general stocking plan for everybody. Just like buying a car, there is a base model that will fit everybody's needs, and options that customize a car for each particular customers wants and needs. You can do the same with the pond. What "book" are you referring to? (where did you read it?)

Grass Carp (GC) don't prefer to eat algae and duckweed. They will only eat those if they are out of other preferred food sources in the pond.

Crappies in small ponds 1) take a lot of intensive management and 2) take a lot of food from LMB mouths when the LMB are small.

You CAN stock the pond with Crappie and LMB, but I don't think that will be a successful stocking plan if your goal is catching 4# to 6# LMB.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).