diff -r b6535c00de8e -r 4aac0b672667 src/EditProductTab2.cpp
--- a/src/EditProductTab2.cpp	Sat Oct 29 15:50:52 2022 +0200
+++ b/src/EditProductTab2.cpp	Sun Oct 30 16:43:22 2022 +0100
@@ -51,6 +51,7 @@
 
     /* Transfer */
     ui->topup_waterEdit->setValue(product->eq_top_up_water);
+    ui->vol_fermenterEdit->setValue((product->eq_batch_size / 1.04) - product->eq_trub_chiller_loss - product->eq_chiller_loss);
 }