Sorry, for taking so long to reply back. I started with a 1/2 full chimney taken from a bag of KBB, the rest went in the pit. I also added two dozen child fist sized pieces of lump, and mixed in. About noon today, I had to add about 3 lbs of KBB to help finish the ribs. That would be about 13 lbs total. Now I did not run with a whole lot of water inside. I would pour in about a half gallon of tap hot water about every hour, and ran dry overnight. Total run time is 19 hours.
I went to bed last night about at 11, and pit temp was 225. At 6:45 am this morning, It was still at 225.