You can use bread, corn, peas and you can sink the bait to a sub-surface level so the birds can't dive bomb your baits so much. The turtles are something you will just have to deal with. I like to chum for a few days to bring the carp to the area I am going to fish. After a day or two of chumming with either bread, corn or peas, I then fish it.
I will fish a piece of corn on the bottom using a tiny hook and a split-shot pinched on my fluorocarbon leader. I will suspend a pea on a tiny hook using a float and a fluorocarbon leader and I will have a piece of bread with a tiny hook embedded in the bread just free-lined on top near the surface. They all work. A carp will strike all three. So it gives me three different baits in three different areas of the water column. It increases my odds on catching a few carp.
NOTE: In certain bodies of water, Grass carp are illegal to remove from waters. Please check the FWC website for up-to-date regulations.
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