Testing specific gravity before bottling

I brewed a batch of beer about 3 weeks ago, and I was told to test the gravity prior to bottling to make sure it is ready.

My question is, will I do any harm by opening the fermentation bucket in order to collect a sample to test with. I do understand the principals around proper sanitisation.

I'm more concerned with introducing oxygen into the fermentation bucket if its not ready yet and I have to wait some more. Is that even something to worry about.

Thanks

Topic bottle gravity-reading specific-gravity homebrew

Category Mac

1
answered at

You won't be introducing that much oxygen by opening the fermentation bucket to simply take a gravity sample, unless you go stirring it up or something.

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