Originally Posted by Yooper
That's a small OG beer. It doesn't need any extra oxygen, so cover it and airlock it now.
This is from white labs on the yeast I used... FAQ
I have used White Labs Liquid yeast on two separate occasions. WLP002 for a brown ale and WLP004 for an Irish stout. Using one vial in 5 gallons of wort, the wort showed no signs of fermentation after 2-3 days. Then I added one packet of dry yeast, and within a few hours, fermentation began. I am wondering why the beer doesn't ferment with only the liquid yeast? I purchase it from homebrew store, and it is kept refrigerated until it is used. Also, to my knowledge, neither had expired.
Sometimes they just need some agitation, which is sort of what happened when the dry yeast was added. It gave nucleation sites for gas to escape and signs of fermentation to be evident. That happens a lot when fermentations don't start; you add another yeast, and soon you see fermentation. It isn't actually what was just added but the kick-start into the yeast. Both WLP002 and 004 are flocculent, and they can settle to the bottom after pitching. With flocculent strains it is even more important to stir the fermenter in the beginning. Either leaving a fish-pump type device with an air filter on for 1 hour post-pitching or stirring the fermenter a few times a day will keep the yeast in suspension and drive out CO2.
I still covered it and set the pail to the side... Let's see what happens... I anticipate a tasty brew, cause it smells and tastes pretty good right from the get go....