Small severums and silver $s food for one BIG silver $?

Hi, tank size= 54g, corner 38x27x22

Current inhabitants= 10" iridesant shark, 5" silver dollar.

Fluval 304 canister.

I want to add 3 more silver dollars and 2 turquoise severums.

Problem=the silver dollars and sevs that I want to add are half dollar sized. Will they get eaten?


Thanks.