Pretty new to the homebrew world, where still figuring out what works...and what doesn't. Question on OG Readings:
Latest batch was a St. Paul Porter from NB.
Recipe noted an OG Reading of 1.052; with a fermentation time of 6 weeks.
Calls for 1-2 wks in Primary; 2-4 wks in Secondary.
Don't have a Secondary, so kept in Primary for Fermentation.
Saw continuous bubbles after Day 1; where after 4-5 days, they slowed considerably (1 per 10-15 seconds).
I kept it in fermenter for a total time of 36 days (5-1/2 wks).
On brew day, I took a reading of the OG before locking the fermenter, and the reading was 1.05.
Bottled it up today, and took a reading, and it was 1.02.
Should OG readings come down, when fermentation is complete? Just curious how I should be interpreting those two readings, at the different times...