If it's pink or white then it's a dead shrimp. Sorry for your loss. Hopefully some cherry shrimp will work out for you. I would get more than 3 or you will never see them. They have a pretty low bioload. If it was me I would try ghost shrimp again. They are just as hardy as cherry shrimp IMO but are generally cheaper. That way if you loose your shrimp again you will know something is going on. Shrimp are pretty sensitive, even the "hardy" ones.