frozen

I wanted to feed my Bichirs some frozen shrimp. Thing is on the backside it says that there is a chemical used as a preservative inside it. Would it harm them in any way ? It was the only thing that was in it other than shrimp and water. Google said it was fine but just wanted to make sure.

What’s everyone feeding there fish? What’s your favorite brand of food ? - I feed a diet of omega one kelp pellets, omega one cichlid pellets, market shrimp, frozen blood worms, frozen brine shrimp with spirulina, and San Francisco Bay silver sides

I'm just tryna get some other views on this subject. For any fish really, but mostly for medium to large carnivores, what would you say you give your fish and what would you say is the benefit of having a wide diet ( depending on the species of course )? Also live , frozen, or freezedried it...