I am in the process of brewing my first batch which happens to be a milk stout. Thought i'd take a stab at one of my favorite types of beer. The kit that i bought suggests that i ferment to 4-7 days in the primary stage and to take a reading before fermentation has completed. Problem being, their air lock was bubbling after 24 hours but has since stopped bubbling. How can i tell when fermentation is completed so that i can take a reading before that? Also, The kit suggests that i secondary ferment for 2 weeks. Everyone on this forum keeps suggests otherwise. What should i do and why? Please and thanks