Hikari Shrimp Cuisine contains copper sulfate in very small amounts. Copper sulfate helps with blood circulation so is benificial. There is a difference between copper and copper sulfate so it should be fine. Hikari Shrimp Cuisine is the staple I've been feeding my bees and haven't notice any ill effects. It doesn't make much sense that a major distributor of premium aquarium foods that has done extensive research on their products, would put something in their shrimp food that would harm or killyour shrimp. Correct me if I'm wrong. But please provide the evidence if doing so.
I was not aware of this. I just read copper and I usually stay away from it with all of my inverts.