Originally Posted by normnmiles
Had a similar problem with my cooler. You might want to look into insulating the top of the cooler by drilling some holes in the top and filling it with some spray foam. Also a false top made of insulation will help.
When I first used my mash tun I lost about 10 degrees over 60 minutes but insulating the top and using a false top I am able to keep loses to 1-2 degrees over the 60 minutes.
Perfect, thanks for the advice. I have since done a second brew and I covered the top with a towel and then a blanket and it seemed to hold the heat much better. Insulating the top seems like a better long term solution.
At the one week point I racked to a secondary while adding the AE. I don't see much airlock activity but I do notice the small bubbles that have been mentioned before. I'm pretty excited to try this one out when it finishes.