About two weeks ago I brewed True Brew's Summer Wheat Kit. Seven hours after pitching I had a steady fermentation(one bubble every two seconds). At 14 hrs the airlock was in a perfect cardiac rhythm. But after about 24/36 hrs fermentation came to a complete stop(I havent seen the airlock bubble since about the 36/48 hr mark). From what I had been reading this sounded not normal. I cracked the bucket lid today, after eleven days, and it smelled like beer and had small circles of something floating on the surface about the size of quarters. My question, is it normal to have fermentation completely stop after 48 hrs?