diff -r 84091b9cb800 -r 50b057ae50aa src/EditProductTab8.cpp
--- a/src/EditProductTab8.cpp	Sat Jun 08 15:54:30 2024 +0200
+++ b/src/EditProductTab8.cpp	Sat Jun 08 16:58:52 2024 +0200
@@ -301,6 +301,7 @@
     ui->wg_phEdit->setValue(ph);
     ui->wg_hardnessEdit->setValue(Utils::Hardness(calcium, magnesium));
     ui->wg_raEdit->setValue(Utils::ResidualAlkalinity(total_alkalinity, calcium, magnesium));
+    ui->wb_volEdit->setValue(product->wg_amount + product->brew_sparge_est);
 
     /* Save mixed water ions for later */
     double wg_calcium = calcium;
@@ -1270,6 +1271,7 @@
     }
     product->wg_amount = mash_infuse;
     ui->wg_volEdit->setValue(mash_infuse);
+    ui->wb_volEdit->setValue(product->wg_amount + product->brew_sparge_est);
 }