Hermits and snails living thru copper treatment?

So I have a small quarantine with a yellow clown goby in it...the goby WAS NOT sick...he is in there due to other reason....well I'v had him in there for about 2 months and he developed some sort of bacteria or fungi infection. My main question is I have 2 little cheap red leg hermits and 2 margretta snails...will they die during copper treatment lol. I know it sounds dumb...because there easily replaced...but if I have too I will remove them and put them somewhere else.