Preserving minnows after their unfortunate passing?

I would love to know how to preserve shiners after they die like you see in those fancy pants bags at Walmart. Any of you guys know how thats done?

Id say just toss them in a vacuum sealer bag and freeze it

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Originally Posted by Jonathan

Id say just toss them in a vacuum sealer bag and freeze it

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I have done this several times as a matter of fact there are some bags in the freezer right now!

I guess I should have clarified better, I don't want to freeze them. I want preserve them in something like salt peter, but theres a formula used to do it.