Slow Cooker Corn Chowder

Name: Slow Cooker Corn Chowder
Ingredients: 4 large potatoes, diced; 20 baby carrots, chopped into bite size pieces, or two large carrots; 2 large stalks of celery, sliced ¼ inch thick; 1 small onion, diced; 2 cups frozen corn; 1 (10 ounce) can cream of mushroom soup; 1 (12 ounce) can evaporated milk; 4 tsp chicken bullion or if you prefer replace this by using four cups of chicken stock in place of the 4 cups of water. Does that make sense?; Fresh ground pepper; 4-5 cups of water (just enough to almost cover everything in the slow cooker.); ¼ cup flour or 2 tbsp corn starch (for slurry at the end of cooking)