Here is the variety I give my shrimp:
Anything they can scavenge in my tank on their own
Fresh blanched veggies (spinach, zucchini)
Mineral Junkie
Bacter AE
Snow Flakes
Hikari Crab Cuisine
Hikari Shrimp Cuisine
Aquatic Arts Pollen Granules
Indian Almond Leaves grazing, along with other other...