Another vote for S&C Aquatics veggie sticks with calcium. Shrimp and snails alike love them, and they have excellent, healthy ingredients. I also feed my shrimp Hikari Shrimp Cuisine, NLS flakes and pellets, and of course they love frozen krill, daphnia, Emerald Entree, bloodworms, Freshwater Formula, etc. about twice a week for variety. Green marine algae in sheets is also enjoyed by the snails. Yep, my shrimp and snails are spoiled!