RE: bait for grass carp
Coton seed cake This is made in to cubes with a hole in the middle.Put a string though the hole than tie your hook to that.Let it hang just under the water.
You can allso take moss and use it. You put the string though the eye of the hook than tie your knot to the shank of the hook. Get your moss pull extra line though the eye of your hook and put the moss though the loop you made.This works good in all water. I have cought most typs of fish on moss. even some nice walleye.