I made a Chimay clone last night and was concerned that the yeast would have a hard time in its high gravity (1.95) climate. Well, its safe to say the yeast has taken hold, as within a day the airlock has shot off and the ale pales lid has half-way come off, due to violent krausen. I made a starter and aerated with an O2 tank. I did not strain the hops, and I'm thinking they clogged up the bung hole. Could this have been prevented?