Relatively new to Brewer's Friend and AG brewing so pardon my ignorance on this one, please! I just completed my fifth AG batch and have been trying to increasing my brew house efficiency. After exceeding 60% a few times in a row, I decided to try 63%, based on my last session (below) Efficiency: Conversion: 83.7% Pre-Boil: 68% 25 ppg Ending Kettle: 64% 23.6 ppg Brew House: 63% 23.1 ppg So after completing this batch @63% BH efficiency, I ended up with: Efficiency: Conversion: 94.1% Pre-Boil: 72% 25.8 ppg Ending Kettle: 64% 22.9 ppg Brew House: 60% 21.4 ppg While brewing, I was excited at the conversion and pre-boil percentages, two positive signs... then the ending kettle was the same as last session and the brewhouse decreased....disappointing. I am not sure I fully understand what happened. In the FAQ is states the ending kettle % is theoretically the same as pre-boil but mine is consistently less and by 8% this session, compared to 4% during the previous one. Could it be as simple as inaccurate measurements or recordings? Sorry for the long winded question. I brew with a gravity fed system (20G wide kettle, 7G Igloo cooler for the mash tun and have a 6G tall kettle for a HLT). Any help is much appreciated! Cheers.