Amber and Shasta

I have a Planted shrimp and snail tank that is I think 5 gallons and it has been set up and going for about 2 months now. I have a big “infestation” of copepods, I know they are harmless and are a good thing to have. I was wanting to know what kind of fish can I put in this tank to control the population of these tiny creatures that won’t also eat my adult shrimp.