I recently started fermenting my 5gal pale ale batch in two separated carboys (4 days ago), one of them was bubbling and had a decent krausen by yesterday, the other one, not so much, in fact it had very little krausen and almost no bubbles , I aerated, and pitched my yeast correctly, I'm using a safale us-05, today I checked both of them, and neither of them were bubbling anymore, and the krausen has decreased noticeably, the temperature is 74 F, so I read rousing is a good option to reactivate my yeast, should that work?