New to brew question

[lampeshade]

I have been brewing for a little over a month now. On my second brew I made a pilsner. Now I have let it ferment for 3 days now and it has not started to emit CO2 the other one I brewed it has already started to release CO2 so I popped the top to see if I should be concerned and I have white foam head with yeast in it. Should I be concerned that bacteria is building up and it's a bad batch ?


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[estricklin]

I think your going to be fine, sometimes you won't see airlock activity due to a bad seal.