I would recomend a size 10 Corky or Cheater to get it off the bottom and in the zone. To help keep your shrimp on, tie a small rubberband (the size that they use for dental braces or close to it) into your hook when making your leader, usually the last 4 wraps of your egg loop works great. Thread your shrimp on tail first and put tne ruuberband around it, this will give you more time in the water with each bait.
Good Luck