I'm not sure I would expect either of those to cycle a tank. Unless those were refrigerated, theres no way for the bacteria to stay alive and even then not for very long. I would ditch both and just toss in a cocktail shrimp.
Do you have a liquid test kit? Don't over do it with the shrimp and flakes.
Those instant stuff you mentioned work but are limited in success. You still have to monitor and it don't happen over night. How much LR do you have in your tank?