My first BIAB APA turned out great and for a 23 litre batch Beersmith brewsheet said to prepare 30.94 litres of water for brewing. For the protein Rest at 0 minutes it told me to add 27.2 litres @ 52.1 C. This was for 4.5Kg of grain. No problem so far. For my second BIAB APA of 20 litres I've upped the grain bill to 6.8Kg and now Beersmith tells me to prepare 29.7 litres of water and to add 40.21 litres @ 0 minutes. How can the the water to add be greater than the water I'm told to prepare. Something screwy here. I need to sort this by Saturday as I'm brewing first thing Sunday Morning.