Pond Boss Forums POND CONSTRUCTION Creating habitat What to do with 18 inch 2x2 's- Structure?

I was just given approximately 150 pieces of pine 18 inches long and 2"x2" by a friend. Can I nail them to a pallet every six inches or so and make crappie structure or would they have to be longer? I am guessing they would stick up from the pallet 14" high.

Is there a better way to make some type of structure for Bass, Crappie, or Fat Head Minnows with this wood?

Thanks