I recently brewed my 2nd all-mash brew of the McMennamins Ruby Ale clone (the first batch didn't turn out at all). I placed it in the car boy last Thursday and added the dry yeast. By Friday afternoon, it was fermenting very actively and I probably lost about 1 gallon in the overflow bottle. Then by Saturday afternoon it has slowed down so I placed the airlock on it and now there is extremely little activity. I doubt if there is even a bubble per minute. Did I do something wrong or is this beer a very slow fermenter?