Soo I brewed my first homebrew last night.. Chilled wort to aprox 74f added to my primary then pitched my yeast... A wyeast smack pack. It set out for over 4 hrs and looked to be ready to pitch so I did. It's been 18 hrs or so and very few bubbles have emmited. I swished the fermenter around and that seemed to get things going a bit. But it just seems slow have not broke the seal and seams like its nice and tight. Any thoughts? It's a British pale ale style nb brand