ok i tried a dry yeast i haven't tried before (Safale US-05) i didn't use a starter or activate it in warm water. directions said just pour on top of wort. never used a dry yeast that i just dumped right on the wort. but it the air lock had some good activity the first few days then got quite. 2 weeks went by and i popped the top of my bucket and started racking into my carboy for secondary dry hopping.
i can't tell if its just yeast or if its serious.