I like a size 8 Kahle for the grass shrimp and 6 for crickets.
If you are fishing from a boat and can get right on top of the structure, I also love drop shot rigs. Just down size from what you'd use for bass. I really like a size 8 VMC spinner drop shot hook. Usually a 1/8-1/4 Oz drop shot weight. Place the hook 12"-18" above the weight. This is where grass shrimp are hammers! You'll be amazed at how large of an LMB will hit this setup as well.
Thanks for the tip. Put 175 RES in my sediment pond late last summer so need to learn to catch them effectively. Most of the guys on here are long time anglers and probably know what a drop shot rig is. I did not, so looked it up. Here are pictures for the other fishing dummies like me.
Drop shot rig pictures There are video's within those pictures also.