Brewed first batch yesterday. All extract IPA, did a full 5 gallon boil, cooled to 78 and pitched yeast. Yeast was White Labs liquid which I propogated 3 times over 2 days, the last time approx. 5 hours before pitching. Shook up the yeast/starter and pitched, boy they were active! Oxygenated for 10 seconds every 15 minutes for first hour then stuck in airlock. Fermintaion evident at 2 hours lag! Full kraeusen at 5 hours, it looked foamy and healthy, 8 inches to top of 6.5 gal. carboy. At 20 hours kraeusen has dissapated to 1 inch thick still with vigorous bubbling in the airlock. After pitching temp went to 81 for about 6 hours then over next 12 hours came down to 75. Is this thing about over already? When should I rack to secondary?